Hey Guys
Yes this has been mentioned before but just to be clear the pinions for the E5 and E6/E7 are different. The teeth are of a different pitch. Two way to tell the difference. The E5 pinion has a shorted base and if you place either pinion against a gear from the other model the bottom of the pinion will not be parallel with the main gear. See photo.... These were placed on the E7 Main Gear.
Cheers
Alan