Actually the sifu and learner makes alot of different. The learner won't be able to tighten nut adjustment very tight coz his kongfu is limited, so if he tighten one side too much at one the other side 'lari' pulak and vice versa, that why ur aligment lari after awhile>>> the screws are not really tighten well. so make sure you don't drift or else all the alignment out.