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I had an HF one. Worked fine for lots of things.
Just don't think to hard about it, or you'll want to upgrade. Issues include:
- Leaks all over. You have to tape the seams, but you can't tape the gasket.
- Leaks are incredibly bad for you. The dust is in the air, so you need a serious filter mask. Tell the filter mask company you're using it for media blasting and they'll tell you that nothing can protect you other than an external air supply.
- Media recovery/filtering. Vacuum rig is expensive. Normal shop vac will burn out if you try sucking up the media dust.
- Cleanup is a mess. The stuff gets everywhere.
- You need a huge compressor to blast continuously. My Sears upright would work for a few minutes, then I'd need to take a break.
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