Setting the rotors back in phase is not as difficult as some might make out. I made a jig some years back which I seem to have mis-placed for the moment. I'll make another if I can't find it. It's simply a 10mm piece of ally plate with 'T' shaped cutout machined to the width of the rotors. Then you drop rotors assembled with the end case (containing the bearings, gears etc) into the plate and torque away. If necessary you position some feeler gauges strategically between a rotor and the plate too get the desired minor positional adjustment if it's not spot on. You have to then drop the assembled rotor gear assembly into the case and build up with the greased end bearing assembly and check the rotor to rotor clearance finally once inside the main body. If it's not perfect, then disassemble and repeat. It's no biggie and worth the effort if you like to put your own stamp on the job.
