Sand Blaster Guns

Not a HF one.i made that mistake, and suffer with it daily. POS leaks more media out the cabinet corners than it consumes blasting
I brought that one to work, only use it for blasting brake caliper brackets where the pads ride and the anti rattle clips sit.....
Did you assemble it dry? If so, there's your mistake. I have a Summit brand cabinet and I sealed every single joint on the box with black RTV.