I have an early 2000 PRT with an Ascension box (similar to the 4G). After some years my X and Y pinions are getting visibly worn. I have 20 tooth now and I'm having second thoughts about replacing with same. In perusing the forum I see that Brady suggests using 25 tooth pinions because they wear better. I think I originally had 25 two gears and went to 20 in hopes of increased power and accuracy. So now I would like any suggestions about which way I should go, 20 or 25. TIA