Sand Blaster Guns

I've been thru 4 blast guns on this (what was at the time) $99 HF cabinet, replaced the glass a couple of times (needs again) for which I get "used glass" from the local glass shop for, and replaced the gloves once (they need it again) but the cabinet itself is a major POS. I'm tired of the sand leakage at every seam, has done that since the day I got it....
Wish I'd have MIG'd the seams when I first got it. I might still do that, it's about out of glass bead at the moment.
The other issue is I've tried a few different foam strips, the leakage out around the door is horrible even though I blast "away from" the door direction.
I glued a 1-1/2" PVC nipple and 90*elbow to the opposite door side and put a shop vac in it, helps tremendously but still junk.... but being the miserable state govt I work for refuses to buy me a cabinet (been asking for years) and bought and maintain this myself for work purposes during work hours I've already spent way more on this thing for abrasive, glass lenses, gloves and guns when they wear out than I ever should have ever had to, I'm trying to minimize my out of pocket.
I only ever use it for cleaning brake caliper brackets, cleaning the rust buildup out of the machined "ways" the pads ride in top and bottom.
But as a fleet mechanic brake jobs are a major part of my day.