Looking for (idler?) gear wheel of HP-46 printer unit

[Duane Hess]

I am so glad you mentioned timing!

Noticed the single "nub" on the drum shaft gear for the rotation sensor and where as there are 2 on the motor shaft. Is there good way to handle alignment of the two shafts? i.e. start off aiming the nub directly at the sensor, or exactly opposite? Any geometry that's describable for aligning between the drum and motor shaft?

Ya leaving a bit of the brass bushing could eliminate the gap; good idea.

Your comments are very helpful.

thanks