I've been lurking on here for the past couple years, but finally found an opportunity to buy an FL200 style cnc router locally off Craigslist. As it was already assembled, bolting additions on required buying either 8020 unique parts or coming up with something different.
To that end, this is what you can do with $0.18 carraige bolts from Lowes:
Chop off two side wings, grind off two corners of the square bolt end, insert into 8020 slot and turn to the right. It may not have the full strength of the original, but it's plenty for the small additions I'm working on. (Bit storage, etc)
Hopefully this is my beginning to giving back.
Thanks for your shared knowledge all.
V