Need more power!
I went with the Vmax7. I am in the middle of rebuilding various worn or bent parts right now and haven't broken in or flown the new engine. I will let you know how things go with the Vmax7 when I do get it in the air. Most likely will do some break in today and flying later this week.
On that note: Does anybody know the bolt size for the Vmax7 crank? I would like to get a prop on there for the break in.
I am pretty impressed that you have one of the older Cox setups. I have never even seen one! I got my LMH right after they went to the Norvel, which was highly touted at the time. I used to fly all kinds of Cox powered planes, mostly 1/2 A control line mouse racer stuff and some free flight. Those engines ran great and I had pretty much zero problems with them. I don’t know how they would hold up to heli duty, but am happy to hear yours is running well. I am just up the road in Ames. Perhaps we should compare notes sometime?
Spiro