I am 5'3" and currently have the allegro (2014 model) which has a footbar w 4 positions and the carriage has 4 positions (which has worked great for me). I want to upgrade to the studio/trapeze combo which comes w the revo footbar and spring system or you can get the standard footbar w the no roll springbar. I have read that the revo spring bar can become disengaged and be dangerous. What situation causes the springs to detach? Do I need the revo? I will be the only user on the reformer. Will the standard footbar fit a 5'3" user w/o any problems?