I broke down and bought a used HF blast booth, which I'm so glad I talked him down because they put it together all wrong and the first thing I need do is disassemble it and do it right.
They were also trying to run sand in it with a way undersized compressor. Didn't have enough flow to suck media from the hopper so they ran the feed hose out the back to an upended orange road side warning cone filled with sand attached to the back.
HF recommends 9 CFM, what they had was basically a nail gun compressor, What I'll be trying to run it on is a stand up 30 gallon piston compressor rated at 6 CFM. I figure I'll upsize the feed line from 1/4" to 3/8"
Learned ages ago the key to getting air tools to work wasn't as much pressure as flow so on field jobs we ran 1" hose from a manifold up to 100' to a 10' long 1/2"-3/4" air whip on the tool itself. When you're driving big Ingersoll 9" side grinders it makes all the difference.
I figure the increased line size may help offset the lower output, it'll just mean it's not 100% duty cycle and I'll have to let it build more frequently. Since it's basically a hobby application rather than a shop I hope it'll be adequate