You're right Alan. The LMH is my 49th model and I have never had this kind of problem with any of my earlier model engines. What's even worse is that club-mates bring their engines to me for fault-finding, tuning-up, replacing bearings, etc!

I still haven't had the ok from Lite about my plan to add 10 fl oz nitro to 50 fl oz of my 10% fuel, so progress is at a standstill right now

Tony