Robinson piltos have a built in (or at least they should have) RRPM governor. When that Low RRPM buzzer goes, left arm reaches for the ground - fast. My governor saved my life once. It is amazing what seeing 83% RRPM on the clock does to ones sphinkter.
Keep the Robby simple and therefore fun to fly. Save the new generation Nr governors for the next generation of a/c - the ones where pilots are optional or simply renamed passengers.