My 4 sons all pitched in and bought me one of those big Harbor Freight Vulcan welding cabinets for my birthday. Overall I really like it but there's a couple things I did to it that made it fit my needs a little better.
First, I had a smaller 40 cu foot argon/c02 bottle for my MIG and the height put the regulator down below the top of the cabinet. I found that a Kidde 292474 extinguisher bracket fit the bottle perfect:
So I drilled the end of the cab and installed four 1/4-20 Riv-nuts and mounted the bracket about 12" above the bottle shelf. Works great, the end of the cab flexes out a little from the weight, but the bottle chain pulls the top of the bottle in so its pretty solid.
Next I wanted a way to secure my welders and plasma cutter so they wouldn't shift or accidentally fall over while moving the cart. I picked up some 1.5"x60" Velcro straps and some 1.5" steel eyelets off Amazon and used 10-24 riv-nuts to mount the eyelets to the top of Cab:
I then cut some HF floor cushion tiles to fit around the eyelets and provide a rubber surface. I strapped everything down and the Cab holds my Miller 180 MIG, Hypertherm 600 Plasma, and Everlast 250DX TIG nicely.
Overall I like it , my only complaint is that I wish the whole layout was reversed so that my MIG could sit on the end and I could access the spool door without having to remove it from the cart. Maybe a project for another day, but It works great for now.