Moe , get the "44" if that size suits your needs. The problems we are having are caused by specific items within each installation. The Little "44" is an engineering marvel and allows you to keep overall weight down in the smaller airframes. Mine was operating perfectly untill I switched it into another plane. That tells you something. Back to the post, I tried Chas's suggestion and backflushed the filter.It seems to have worked. My accel delay is 25, deaccel delay 25, Stabilty delay @ 50. Ran the engine up very slowly to 190,000 and kept it there. It hovers around 190,500 and 189,500 but now it will hold at it's top speed rating. I throttled down and it runs above idle for a while before settling down to 56,000 were I have it set. Here's the problem, I still have some throttle travel left on the stick and when I push full up it goes beyond 190,000 and starts to power down. The ecu is trying to control the top speed. It looks like a calibration problem at this point. Will talk to Wren to see what they recommend. Doug