those blasters work good after you get them tuned in i had trouble getting the right size tip then i found out the longer thr air hose the better between the compressor and the unit next only run between 90 to 100 lbs of air then ajust the sand flow valve down to the point it just lets a small amount of sand threw and dont try to reuse the sand mine works good i save hours of sanding with this unit its just like anything elase you have to get it tuned in good luck you will save money
