You are right....

It is a beast to get started when the engine is inverted.
But with mine, once I got it running, and the engine warmed up, then it would run fine.


My flying buddy just crashed his PC-9 yesterday. He had installed a webra 60 in his. He went into a steep dive, then the tail began to flutter. No control on the elevator during flutter, and the plane went in at full speed. He even cut the throttle, but it didn`t slow it down at all.......Total loss

My field has eaten up 3 PC-9`s now

Lost mine flying into a sail plane...
Anothe guy lost his due to radio error
And my buddy`s....I think he overpowered it. He even had installed sulivan cables in it instead of the normal wood/wire pushrods that were included.