I have a homemade cabinet - a bit lager than yours. Mine started out as a Montgomery Wards siphon unit I bought back in the early '80s, in that I used the hoses and gun on my cabinet. I made the cabinet in ~'93. About two years ago, the gun finally gave up the goose, and I ordered a new gun, foot control and siphon system. There is no trigger - it's foot operated. I love it. And what a world of difference - a lot more media - much faster removal. I also bought a dedicated Econoline vac and retired my shop vac from use with the cabinet. But, it is very loud too. It probably uses the same universal motor the shop vac uses.
I've decided that my next upgrade will be a reclaimer / filter / separator system and a quieter vac - I think I'll look into what you did. I'm not sure if it does everything I want though. Where did you get it? How much $$?
If I'm asking a questsion about my car, it's a '67 Coupe, 289 2bbl, C4, P/S, manual brakes, no A/C. I'm restoring it so I can SELL IT!