you know what i just realised that there may be no room for a rear exit. man i hate when they dont think about this.i was told you should be able to knock the worm assembly straight out when uncoupled from the brake. also the shimming of the crown wheel assembly is on for teeth matching (depth) and balance for the crown wheel so no eccentric stuff happening there. have a look and let me know.take a couple of snaps of the rear for us to see what going on there if you can.