To save some money, we maintained our PG71 setup by replacing the RS775s with 9015 motors (am-0912), providing us with a 71:1 ratio (225RPM Free).
We use 4 7/8" BaneBots wheels too, giving us a decent ~4.75 ft/s tangential speed on the intake. If you choose to pair your existing PG71s with 9015 motors, be sure to order the
necessary hardware kit.