Go to ESC COSSY 'room' I put some info. in there about shafts.
You cannot use the whole shaft as it is 15mm longer than the esc. ones, I got some new Sierra 4wd ones and tried. In a straight line they were fine but round bends they were rubbing and all sorts- it was well bad.
Because my car is low (well actually it is f##ing low), I got the shafts machined down by 7.5 mm and now they fit fine.