Reddit mentions of HooToo USB C Hub, 7 in 1 USB C to 4K HDMI Adapter with 100W PD Charging, 3 USB 3.0 Ports, SD/TF Card Readers for MacBook/Pro/Air/IMAC/iPad Pro and Type C Laptops Chromebook

Im not sure if something like this would work for you https://www.amazon.com/HooToo-Adapter-Upgrade-Delivery-Grey/dp/B07M6R3CPB/ref=mp_s_a_1_3?crid=K7YH9F8OT8RR&keywords=hootoo+usb+c+hub&qid=1557260610&s=gateway&sprefix=hootoo&sr=8-3

Sorry for the late reply. Didn't use the laptop much during the weekend. Attached are the scaling images you requested. Not sure how much help it will be watching on a different monitor, but you be the judge of that.

Link to Scaling > Thinkpad X1E 4K Display Scaling in Windows 10 . As for Display panel, HWInfo doesn't show anything. I went to device manager and was able to get the Hardware Id for the display which happens to be "MONITOR\LEN4180". The display is truly gorgeous btw. :-) . From where I bought it, I had the option to have it calibrated at the factory. If you want the colour profile file, please let me know.

Here is how I'm setup for my work area > I have a HooToo USB C Hub that I use to connect to my 24inch 2560X1440 display. I power the HooToo hub with a 65W USB C Charger (one that came with my X1C) and when I connect the X1E, I get the "Slow USB Charger" warning. But it does charge the laptop, slowly rather, but I am not complaining. The hub provides PD up to 100W so I could technically use a higher powered USB C charger I suppose. It is not all seamless, like you have to power cycle the Hub after restart and such, but my expectation out of a sub $50 hub is rather low. So I'm fine.

Now onto the issue of scaling between monitors > Yes some of the apps get fuzzy when you move from one screen to another. But in my daily use case, around 95% of the apps I use, scale quite well. File Explorer, Visual Studio, OneNote, Browsers they all behave fine. Also, if you only use the external monitor when plugged in, then you eliminate all scaling issues. I always use both the laptop screen and the Monitor together while working, as I prefer the extra screen, and I can very much live with this minor scaling issue. I also heard a lot of noise about 2 monitors with different resolutions causing havoc in Windows, but personally, I don't get what the big fuss is about. I suppose Windows 10 fixed a lot of issues that existed in the past. To summarize, I am using an external monitor which has a different resolution from the 4K laptop screen and I have no complaints.

Regarding Noise > It has only been a couple of days and still windows is going through hoopla to install updates and what not, so from time to time fans do come on. Also, the fans are on when I'm like watching 4K YouTube or Netflix etc. But they are not like super loud (jet engine) and since I use headphones at least 90% of the time when watching movies/shows, it doesn't bother me as well. I rather like the fact that the fans keep the bottom of the laptop cool. X1E is lot more comfortable to keep on my lap than my X1C6. Also I hated the heat coming out on the right side on my X1C, no more of that annoyance. There is a faint "coil whine", but in order to hear it, even in a absolutely quiet room at night, I have to press my ear firmly on the keyboard. Only then I can hear some static noise. In other words, yes it is there, but doesn't bother me a bit. I guess these things are all subjective. For someone else, it might be a deal breaker. For me, I didn't even look for it, until I read about it in your question.

In my Limited use for last couple of days, I have not found any lag/latency when using the X1E, with or without the external monitor. Also on this regard, it is worth mentioning that I am only using stock 8GB at the moment, haven't upgraded the RAM or the SSD yet.

Now here comes the bad parts > First of all, the Network Card keep disconnecting and this problem is affecting me more than anything. Most of my work are Web/Internet based and I simply can't live with a scratchy connection. It has already happened, where it disconnected inside filling out an online form and I had to start over. Still scratching my head as to what I can do to make it go away. Remember I said that these "Issues" are subjective. Like the coil whine doesn't bother me at all, it is almost non existent for me, but this WiFi issue is a "Deal Breaker" for me. Unless I can fix it, I will have to send it back. >> This just happened after I finished the post and hit "Reply" only to notice that I was not online anymore. Sucks. <<

Second thing is the TrackPoint Mouse buttons, specially the Left and the Middle buttons are problematic. They don't register clicks unless you push hard. I am a heavy TrackPoint user and this I can't live with either. I have already filed a case with Lenovo and expect them to replace/fix it.

Ok rather a long post, and I had to write in a hurry, so if I missed any of your questions, please let me know. Hope my answers help you make the right decision. Cheers.

[Edit: Spelling, Grammar]

Kingston is a reputable company and there shouldn't be an issue. Many times it's user error. But not sure how something so simple could got wrong. Using the pass through charging shouldn't be an issue as it should be to spec but sometimes companies get it wrong (look at the raspberry pi 4)
I use this one with much luck But there are so many out there.

So here's an update.
I first want to thank you for responding and offering your input!

I also want you to know that although I had asked for model specific info I decided to go a different route.

1. I went with this for my power supply:
   https://www.amazon.com/gp/product/B07SQPS7N2/ref=ppx_od_dt_b_asin_title_s00
   Got it for $15 USD with a coupon and an additional percentage off.
   I figured with the same 30W PD and additional 18W QC ports it was a deal.
   
   
2. I found this hub:
   https://www.amazon.com/gp/product/B07M6R3CPB/ref=ppx_yo_dt_b_asin_title_o00_s00
   With another coupon it came to $30 USD, another good deal.
   I knew I wasn't getting all the ports some of the other hubs offered, but hey...a good price for something labeled "2019 Update" (maybe upgraded chipsets?) and the power delivery looked good-to-go!
   Found it cheaper on Ebay, but buying through them I consider a crap shoot...there are way too many con artists set up there these days, you never know WHAT you'll get.
   At least I have guaranteed return options with Amazon.
   
   
3. I just tested it with that Seagate Slim :
   https://www.newegg.com/p/N82E16822178436?item=9SIA9K89UG1149
   This I picked up for $20 USD (still in box with protective wrapping) at a local Goodwill store.
   
   
4. I also years ago had purchased the USB Media Explorer:
   
   https://play.google.com/store/apps/details?id=com.homeysoft.nexususb.importer
   
   to use with one of my first tablets, the old Nexus 10...which still works albeit only with external power (the battery is shot)!
   
   Everything works...it just works.
   
   I can now pack the Seagate and run it as long as I want without draining the internal battery and by doing so I hope prolong the life of the Tab S4.
   
   
   Again, thanks!

I am a photographer and I can have my external hard drive, flash drives, SD card, and my HDMI cord plugged in all at once. It makes my work quiet, fast, and efficient. It is very well made.

https://www.amazon.com/HooToo-Adapter-Upgrade-Delivery-Grey/dp/B07M6R3CPB/ref=sr_1_66?keywords=usb+c+hub&qid=1557304501&s=gateway&sr=8-66

I got one from HooToo for my MBP, it works great, and only cost me $35

Here

I assume by "dex" you mean that you would like a USB-C HDMI adapter that you can use with your Note 9 to connect to an external monitor so that you can use Samsung Dex mode. You'd like a USB-C HDMI adapter that has two standard "large" USB slots that you can plug your keyboard and mouse into as well, and as well as a USB C port with power out. You'd like this to not require external power for some strange reason having to do with your not having a long enough cable from your charger?

The fact of the matter is that a USB-C HDMI adapter, as well as the keyboard and mouse that you'd attach to those slots, require power from somewhere. If you don't plug an external power source into the HDMI adapter, then that power is going to come from your Note 9's USB-C, draining your battery very quickly.

That's why most people will use a USB-C Hub/HDMI adapter that you can plug the power adapter into, and which will do pass-through charging of the phone via the USB-C plugged into the phone. I personally use (and recommend) this one from HooToo with both my Note 9 and Galaxy Tab S4:

HooToo USB C Hub, 6-in-1 USB C Adapter (2019 Upgrade) with Power Delivery, 4K HDMI, 3 USB 3.0 for MacBook/Pro/Air and Type C Windows Laptops(Grey) https://www.amazon.com/dp/B07M6R3CPB/ref=cm_sw_r_cp_taa_iTxkDbD0D9YG4