so i've figured out how to do barspins while manualing, and the bruses on the inside of my knees are killing me, how hard is it get them in the air? do i still need to pinch my seat like with no handers, or not, since you only let go of the bars for half a second? should i wear a cup in case i land with the bars 90 degrees short? any tips from experinced riders? thanks.