One thing to realize when you have an airplane on leaseback to a school and they also have school owned aircraft, you can bet the school owned one will fly all the time, and your leaseback will only fly when theirs is booked or in maintenance. Even if you have the nicer, more popular airplane, they will start playing games with the scheduling to steer the students to their airplane.
Lease backs and the pitfalls and gotchas are a whole 'nuther thread, however..........
I really don't know what you mean by RPM limits, the Sensenich prop under the Sensenich STC (SA1219EA) is limited to 2550 takeoff and 2440 max continous, and the operations manual says that performance is the same as original (actually its better, they just don't want to say so, more certification hassles) The pitch is specified as being 52 thru 56 inches and full throttle static RPM must fall between 2100 and 2275 or either the pitch is not right or the engine performance is suffering in some way. You can look at the yellow tag or 8130 issued with the prop from the repitch to see what the new pitch of it is.
Charles
Charles