Acros ZS44 blocklock upper headset press adapter

An adapter to be used with one of the generic M12 based headset presses such as the Toopre headset press on Aliexpress. 

The adapter features a locating feature for the inside diameter of the bearing and a relief which prevents force being applied to the inner ring of the bearing which could cause damage as well as a relief for the blocklock nub on the cup.

I've printed the adapter out of Prusament PC-CF with 4 perimeters and 50% infill. Other materials might also be suitable.

In some cases the hole in the middle of the adapter might be a little bit too tight to fit around the threaded rod on the headset press, if this is the case I recommend drilling it out with a 12mm drill bit.