I have been asked by a number of BMW boxer owners now, what about the TB's that have the pulley pressed onto the shaft. So, some of them, for later years, the pulleys get on the shaft and then they have a hole in the middle, which is punched so that the pulley stays fixed on the spindles.
The spindles that I supply for such TB's have a hole and inside thread, screw and washer that are used to hold everything in place. So you can just punch out the old shaft with something round and hard, having the OD =< 5 mm and you can easily break those apart and use my spindles. Just use the force, nothing else :)
And once again, remember to punch the small M3 screws after putting the plate inside, in a "+" pattern, as a safety measure.