Not a trouble or trouble shooting really, but have 2 mini crankers and one has a rubber o ring securing the "crank" to the A bar and one has a metal circlip instead. Now in an earlier thread which i cant seem to find again it states that the difference is one has little give (o ring) and one has no give (circlip) I have now just read in a thread started by Devans that the small give effect is actually dictated by the nut at the front of the A bar. Any help greatly appreciated ...dont intend to tinker just like to know stuff