I can adust the downward force using the big big spring at the back, the blade tension, the ball bearing blade guides (in out, up down and twist), the speed using a stepped pulley, the cant on the idler wheel and the feed rate on the damper piston. Two hours faffing around with it yesterday trying to cut 3 x 3/4 aluminium bar, even tried a new blade at £25 a pop. It goes so far then the blade jambs and pops off the driven wheel. It's driving me spotty.