Shane,
I know one thing for sure, from personal experience ... while the "coupler bell" on the end of the drive shaft, can be removed with a good puller, a little heat, and a dead-blow hammer,
reinstalling them, with 150-180 ft. lbs. of torque (as spec'd)
will require the BMW tool to keep it from rotating while torque is applied to the nut. The mating taper-fit on the end of the drive shaft, and the inside of the bell, is the only thing that secures that joint; there are no splines, or key. If it's not
blue-torqued on there is a pretty good chance that it will break loose and spin.
Locking up the
u-joint end, to torque the bell, is risky because
it was designed with no more than the torque of the engine/gearbox in mind, roughly 43 ft. lbs. (58 N?Àm); between this and the drive shaft itself loading up (twisting) and disrupting torque-wrench indications, it's not an accurate way to go about reassembly.
After I took mine apart for painting I ended up shipping the whole thing up to Ted Porter to ensure that the bell was properly torqued.
Just another niggley little detail to be thinking about while the swing arm is being painted.
