[Al Skierkiewicz]

I like the motors but they do have their problems.
The brush assy is designed to be inside a housing not in the open so it does not have any strain relief or protection. An enclosure or tywrap fixed that.
The quality control on the soldering of the wires was pretty bad. In some cases, the connection heated due to the bad soldering and eventually let the wires fall off. Better soldering techniques at the factory would cure that. The factory I would guess is already aware of this problem in the number of warranty repairs due to motor failure the drills are having.
If the motor was used with the supplied transmission then there was enough input air flow but if you used the FIRST mount, it blocked some of the fan output. Those teams that used this transmission/motor/supplied gearing were usually OK if they didn't try to couple to large diameter drive wheels and kept all the shafts in alignment. Friction induced by side loading, lack of sufficient bearings, shaft misalignment, too large a drive wheel and failure to remove the locking rollers all contributed to a high rate of failure caused by overcurrent heating.
In other words, "Know thy enemy". The new motor is a welcome addition.