OK
I first checked my passport which has the same setup. Neu F3A and HV85. It worked fine. Then I tried my Visa with the suspect HV85. It did the same thing as yesterday. The low endpoint was shifted. I should clarify that I mean it was as if the low throttle trim was advanced to about quarter throttle. I reprogrammed it with the latest castle firmware and went through their manual endpoint setting procedure. I also did the same thing on my other HV85. They both indicated high throttle by beeping at the same point and also indicated low throttle and armed at the same point. However my suspect HV85 still had the biased low throttle offset. As soon as I advanced throttle it jumped up to about 25% power. So I installed my good one and I guess I'll contact Castle. Very strange.