Originally Posted by JHZR2

Given that I haven't done it before, I'd rather do it right. I don't have a feel for it.

And I am inclined to add the additional thermal capacity of the heavier front rotors which will help act as a greater sync of converted momentum, since I'll be looking to put rebuilt calipers on anyway. Nobody sees the rotors, it really isn't a look thing on a w123, but a peace of mind and additional heat holding capability is provided, which is beneficial, IMO