While I wouldn't recommend sourcing 80/20 from tnutz.com, I would certainly recommend them for 80/20 hardware (tnuts, brackets, gussets, etc.). Way more reasonable pricing.I priced 80/20 connectors and had a money fit!!! Then I saw Orton’s post and how he made most of his
own connectors. I ended up making ALL of my own connectors. Nothing to it.
I used a cheap harbor freight drill press I already owned.