"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in
. 3.70:

Doug White fired this volley in
:

The problem is that they take a lot more air than most home shops can
supply. Lots of CFM at moderately high pressures.

4cfm shouldn't be much past the ordinary HSM's compressor.

Maybe they've gotten more efficient, but the commercial ones I looked at
years ago wanted 8+ CFM at 80 PSI or better.

Doug White