Reddit mentions: The best rivet nuts

How much movement do you expect?
Does the top need to be fastener free?

One thought would be to install rivnuts into the sheet metal top then fasten the wood top using connector bolts. The holes thru the wood top would have enough clearance to the bolts to allow movement as long as you dont let a 500lb gorilla tighten the bolts.

The connector bolts are relatively low profile and shouldn't interfere with the tops function. But They could also be set in a counter bore with similar clearance between bore and head as the shaft and thru hole to allow clearance.

Rivnut example https://www.amazon.com/dp/B07BFVHCTL/

Connector bolt example
https://www.amazon.com/Hard-Find-Fastener-014973445744-Connector/dp/B00KM4OYJC

So far I like it pretty well, I was thinking of doing parallel 7th or 12th, but looking at both, 7th seemed a little too "fanned" at the high frets and 12 at a the low. so split the difference a bit.

The inserts? bought off of amazon, m3 threaded. I don't have the link to the exact product on me, but like these: https://www.amazon.com/20pcs-Metric-Steel-Insert-Rivnut/dp/B00W8TTXFY/ref=sr_1_4?srs=3049510011&ie=UTF8&qid=1474291463&sr=8-4&keywords=m3+threaded

Its actually a pretty close to standard spacing (e to e = 1.4" and 2.136" at bridge), angling the nut makes it look more narrow. (freaked me out when I cut neck width it just felt wrong.)

I just finished a second crash cart for my SO, and this time I kept track of the parts I used during assembly. So as a gift to the VR subreddits I tend to follow here's some assembly photos and a full parts list should you want to build your own.

Parts list:

(1x) HF / USG Rolling Toolcart $99 with coupon - https://www.harborfreight.com/26-in-4-drawer-580-lb-capacity-glossy-black-roller-cart-61634.html

(1x) Asus VP239H-P Monitor - https://www.newegg.com/Product/Product.aspx?Item=2W2-000Y-00007

(1x) VESA mount - https://www.amazon.com/gp/product/B000VKCIJU/

(6x) Rubber Grommets (requires 1 1/2" bi-metal hole saw) - https://www.amazon.com/Heavy-Rubber-Grommets-Inside-Diameter/dp/B06XKJ4NRF/

(1x) PRIME Power Strip - https://www.amazon.com/gp/product/B003DKJ2VC/

(1x) Best Buy - 9' VR Cable Extension - https://www.bestbuy.com/site/insignia-9-vr-extension-cable-black/5706844.p?skuId=5706844

Additional parts required:

(4x) 1/4" x 3/8" steel rivets (requires rivet gun) - https://www.amazon.com/Surebonder-FPC86S-100-4-inch-Medium-Rivets/dp/B001C2FW3A/

(2x) 1/4 x 20 Rivet Nut for attaching the power strip. (Requires nut setting tool) https://www.amazon.com/uxcell-Plated-Carbon-Nutsert-4-20UNC/dp/B00X74FNVW/

(2x) 1/4 x 20 x 3/4 button cap hex screws - https://www.amazon.com/uxcell-Inch-20x3-Socket-Button-Screws/dp/B015A3ABL4/

1 x 1 cable tie mounts for dressing the wiring inside the toolchest -
https://www.amazon.com/Darller-Adhesive-Cable-Mounts-Holders/dp/B071WW8P83/

4" cable ties, black -
https://www.amazon.com/C2G-Cables-43036-4-Inch-Cable/dp/B0002GX1XA/

And lots of blue loctite for all the fasteners during assembly.

Optional but makes life easy:

Logitech K830 wireless keyboard - https://www.amazon.com/Logitech-Illuminated-Living-Room-Keyboard-Touchpad/dp/B00ZOPVSKW/

The last 7 photos are from the first VR Crash Cart I built to help illustrate some of the assembly steps involved.

Not completely. You have to install rivnuts in the subframe and in the framerail. You have to install rivnuts in the subframe for any manufacturers x brace though. Using the e36 M3/z3 cross brace mounts on the frame rather than on the control arm bushing mounts for e30 specific ones.

I bought a rivnut installation tool for other projects so I already had one on hand. You can get cheap aluminum rivnuts from harbor freight, but I wouldn't recommend them. I'd go with steel ones.

This is the one I have:

https://www.amazon.com/Astro-1427-Hand-Rivet-Nut/dp/B004KLVJAA/ref=sr_1_4?ie=UTF8&qid=1501679923&sr=8-4&keywords=rivnut

And you'd want to get these (you need 4x M8 and 2x M12, IIRC) style rivnuts:

https://www.amazon.com/Hilitchi-150pcs-Plated-Threaded-Nutsert/dp/B01I3Y0ZHC/ref=sr_1_2?ie=UTF8&qid=1501679923&sr=8-2&keywords=rivnut

Sutemribor 304 Stainless Steel Flat Head Threaded Rivetnut Insert Nutsert Rivet Nut Assortment Kit 120 Pcs, 6 Sizes - M3 M4 M5 M6 M8 M10 https://www.amazon.com/dp/B07CMKS9K6/ref=cm_sw_r_cp_api_u0LNBbWDBX667

Any of these sets will do you well.

That first tool is something similar to what mechanics or other craftsman use for spacing rivets, drill holes, or anything else that needs even spacing. https://www.amazon.com/Aircraft-Tool-Supply-Rivet-Spacing/dp/B005VR2DJ8

https://www.amazon.com/uxcell-Stainless-Threaded-Nutserts-100pcs/dp/B015A3J2SW/ref=sr_1_2?ie=UTF8&qid=1495132730&sr=8-2&keywords=rivet+head+m5

and

https://www.amazon.com/Alloy-Steel-Socket-Screws-Black/dp/B015A37MSO/ref=sr_1_2?ie=UTF8&qid=1495132750&sr=8-2&keywords=m5+x+20+socket+head+screw