I don't know what the saftey factor is for the LMH but if the manual says 2000 is the safe "never exceed" head speed, and the LMH folks provide an engine upgrade (vmax7) that is going to exceed that speed....and then tell you that it is alright......that suggests to me that they may not know what the safety factor is either. Notasme has done a wonderful thing with his engine modification. He has plowed new ground.....and that does involve risks. Maybe now the LMH folks will learn how desperate their customers are to find a dependable engine. I can't understand how a company that seems to be as popular as they are has not contacted another engine manufacturer to build an engine to their specs. The vmax6 is pathetic and I'm afraid most people feel the same way about the vmax7. I'm also afraid that instead of correcting the nitro problem the LMH folks may shift their efforts to electric. Most upgrades seem to be for the 120. I have nothing against electric....but I prefer nitro. The 110/116/117 helis provide many hours of enjoyment and I have learned much about flying with my 110. But I've also had hours if disappointment.
Mark