Sand blaster question

[nkopper]

I have been doing a little research on sand blasters in the past few weeks. I've got a 100 lb capacity siphon feed model I bought for $10 at a swap meet that doesn't work very good with my small compressor. It's an older Sanborn 5 hp 30 gallon unit, although 5 hp is a little optomistic. Max working pressure is 125 PSI, although I'm uncertain of the CFM rating. I'm looking to blast mostly small parts for now, like the inner wheel housings before I widen them, a-arms, etc. Does anyone have experience with a pressurized blaster and a small compressor like mine? I'm leaning toward a 5 gallon blaster from Harbor Freight that can run on 60-125 PSI and 6 to 25 CFM. I am currently using Black Magic media if that makes a difference.

Thanks!

Nathan