I seen Todd fly his 180 last weekend at an IMAC here is what I think about it ,,It started easy and at idle it looks smooth and sounds like a dragster .(it had stock mufflers).he had a Bolly 32x10 on it and it would bark so lound it woke my dead grandmother,,he said they are still trying to find a suitable prop for it ,,I know that 32x10 was no competetion for it ,,He flew at half throttle or less ,with more than enough power I will be keeping a watch on this engine ,,Todd maybe onto somthing with this ,,Time will tell though,, IMHOP