I always thought the pack out drawers would make a good saw stand, if you already had them. Cool build. I made a similar set, but mine are 12"x60" and Just rest on the smaller dewalt stands arms. I made brackets that are bolted on the saw and lock the wings in with dowels and a toggle clamp.
Yeah I thought about making it smaller (60" or so like yours) but I cut so much long trim that I decided to just make it bigger. I've seen them done on the dewalt stands. I have the mini makita stand (which is similar) but I found that it was still too bulky to transport. Toggle clamps are a good idea. Quick and easy.
Go for it! That’s why I made the video. I took some of the ideas from other videos I’ve watched and added some of my own features to make it work for my needs. I expect my viewers will do the same!