Any idea why the gear case was changed to the 1.60..?I have a 2019 21XRS w/300R 1.60 years. Currently running a worked 28P Bravo 1 with all holes fully plugged, I am unsure what has been modded on this prop. Prop shaft to pad is 3/4” above pad. With fishing load and two guys (420 lbs combined), live wells empty it has no problems getting on plane. It has zero blow out and spins up to about 3900RPM. Best I have seen with same load is 84.7 @ 5750RPM this is in summer heat. Had seen stuff on the Powertech prop so was thinking about looking into one. My boat is a demo model and had been much faster with a 1.75 gear case and a Mazco 5 prop. I am wanting to find the best setup for fishing and hole shot.