How fast without the paint? Used to be able to repeatedly get 63.5ph on the gps. Can't remember revs, mighta been 4800ish.
It seems like Im getting the same speed as you did, managed to get about 62,5 today. It feels like the boat runs really smooth and easy in the water though.
Cruising speed is around 45 at 3000 rpms. Works for me!