[vertigo]

When comparing the combination motor/gearbox that you linked with a picture of a stand-alone PG27, it still looks like there is an additional silver adapter plate that is added to the back of the gearbox. We currently have both the motor and the gearbox separate and the motor output shaft is too long for them to be mounted together without some additional hardware in between.

It does look like I had the wrong pinion though. Thanks!