Reddit mentions of Dremel 231 Portable Rotary Tool Shaper and Router Table- Woodworking Attachment Perfect for Sanding, Shaping, and Trimming Edges

I really wish I had taken more pics, but this is what I have. To be fair, lots of much more talented folks have done full videos of the process, so I defer you to them. u/vikingcode1 has a great example showing how straightforward and easy the process can be. I will try to take more pics next go-round.

to your other questions - for the lamination I first glued up two halves, each consisting of one piece of andiroba and one piece of pecan. I milled them to be as identical as possible, then using my table saw I put a 1/2" wide and 1/4" deep groove down the center of each. I also milled up a 1/2" square piece of pecan, cutting about 2" off of that to use as a plug. with the plug on one end and the rough key stock on the other, I glued up the two halves. once the clamps were set I pulled the bar out to work on it.

while the handle blank was drying I used my dremel with a router table attachment and a cutoff wheel to cut the main part of the recess for the carbide insert. it was easy to just eyeball the depth and go. Then I shaped the end of the bar with my grinder, rounding it off a bit. That wasn't really necessary but it made a much cleaner looking final product. I drilled and tapped the bar to match the EWT screw threads.

The "cap" is called a ferrule, and I made mine from a piece of 1" (od) copper tubing. I think a lot of people use the little couplers (1" id) that are designed to join 1" pipe, but I thought that seemed too big for my taste. The couplers are cheap enough, but the section of pipe is even cheaper, assuming you don't mind cutting off pieces to make your ferrules. if I was just making one tool I'd probably use a coupler. The ferrule and the tool bar are epoxied into place, as are the BBs I used for weight, though I don't think the BBs needed the epoxy.

as for handle to tool ratio... I don't know. I went with what looked right to me and seemed like it would be stable enough. it's a 12" bar with about 3" inside the handle and 9" protruding. I have a longer handle and a slightly shorter bar than the EWT version and am very happy with the result. The best part of doing this yourself is being able to make it exactly how you want it.

So I have recently started doing my own scale work. It is quite fun but can be tedious work with how precise you MUST be for drilling screws or the knife wont go back together properly. Blade centering can be screwed up etc.
Anyways the main tools that I use are as follows:

Skil Drill press

Dremel 4000

Dremel Shaper Table

Swivel Benchtop Vise

You will still need other assorted accessories like sanding wheels, cutting wheels (if you dont have a table saw for cutting down G10/Wood/Whatever media). While I am not a pro and I am just starting these are the essentials. Please feel free to PM me or email me hd600s@gmail.com if you have any other questions. I would be more than happy to help. It is extremely rewarding when you complete a set. The first few may not be perfect but you MADE them yourself :)

The only 2 I have successfully completed. I still need to work on my pattern technique