I bought the travel trac rollers from Performance Bikes and I must say, I'm getting my ass kicked by it. After watching people demo rollers on youtube, I didn't think it would be that hard but I'm really struggling trying to keep my balance. I'm using a wall for support but I can't seem to keep from fishtailing all over the place. I can ride unsupported for a while but not long. For you guys that use rollers, how long did it take you to get the hang of it? Also, my bike has the frame mounted shifters, am I asking for trouble trying to switch gears using the rollers since I have to release the bars to shift?