in reply to the first question, all you need to do is loosen the bolts which hold the stem to the forks, then (whilst making sure not to move the bars) tighten the bolt above the bolts you have just loosened. After that tighten all the bolts back up and the 'rocking' should have gone. Just make sure that you havent done the top cap bolt too tight by turning the bars as if you were about to go round a corner, if it feels stiff then do the above steps again but loosen the topcap bolt instead of tightening it slightly. hope this helped ..rob..