Fred, thanks for the helpful suggestions. It had not occurred to me that the quick power changes using an accelerometer may require a lighter prop.
I think Howard Rush also uses the active system. If I had the skills of Paul, Igor, Howard, and other top flyers I might be more inclined to use one too, but alas that is not the case. One of our locals here in NorCal has a Shark with the accelerometer, and has had trouble getting it dialed in despite having advanced knowledge of electrics and computers, to the point I think it detracts from his flying rather than adds to it. Still, the idea of a boost at the climb into the hourglass and some other points in the pattern is attractive. Luckily these systems are fairly easy to change out. BTW the motor is an OS 3825 750KV with TP 5-cell 2600 batteries.