Wow, Off On The Gear Ratio

5 revs aren't 4.8 revs, 5 revs are 5 revs, so you have 5.1 most likely, 4.8 revs would be 4.88 and just short of making 5 revs.

So take into consideration the slack in the carrier and pin and your 5 revs are most likely 5.13