I loaded it up with a "loose" 11 or aka 11 Round Shader, just to do some Blood lines on my Leg.....Tightening the Screw to adjust the Needle Bar tensioner, can adjust the Duty considerably, so I slackened the tensioner right off, and put on some elastic bands.Sat at 9 V's, was approx 105-115 cps, 45% Duty, 0FT..Probs the most hardest hitting machine I came across in a while,LOL...On full pelt, it has about a 5mm stroke length,LOL, never gonna use all that, but it is there if you ever need it..Lets take a minute, to think of the Client that this Machine is being tested on....Ok, with that out of the way, will have the Review on within 36 Hours...