Reason i ask is this. You can turn your harbor freight cabinet into a sandblasting MACHINE, with an upgrade from Tacoma Company found here: Tacoma Company.
I make antique gun parts for a living, and use my blaster A LOT. I have a great cabinet but the gun and internals were shot. I found Tacoma Company through a youtube video here:
I bought the upgrade kit and my blast cabinet works better than any cabinet I have EVER used. It is now a media blast monster. I cannot recommend Mike at Tacoma highly enough. I sent him about a dozen pics of my machine and he put together the right parts, and bango, trouble free ever since.