I have already benched the 75ax when I took it out of that model. Only thing someone else did it in my absence, so I dont have the peace of mind that it ran without problems.

I agree with what you are saying, carrellh. I contemplated over it during the day and decided that the best thing to do is to put in the 75 on the Reactor and try it out. If it is still cutting out in this airplane, I have a $ 250 repair on my hands (that what it costs to obtain piston-liner assembly for both the 55ax and 75ax thru Indian customs) in which case I will put the slightly lighter and lot more reliable FS91SII in. And they all have the same mounting dimensions. That is still cheaper than getting the 65ax at $350 landed and there is the possibility that the 75ax may work in the first place so I dont need the spare parts or to pull the 91 out of its home. Thus I can skip the 65ax alltogether. So lots of possibilities, but I need to start with the 75ax anyhow

Ameyam