I still dont think you grasp thrust line vs center of mass .
I am talking about horizontal thrust line and horizontal CofM
Vertical CofG is something else
Let me greatly exaggerate ....
--- Place your engine on a mount 25 feet above your machine
--- give it full throttle
--- will your aircraft move forward or fall on its nose ???
I understand EXACTLY what you mean. Perhaps I can state this more succinctly...
For a straight 1/2 VW Engine directly driving a propellor, the thrust line will be higher than preferred, without redesigning the fuselage.
I DO NOT WANT the added weight, expense, or maintenance of a REDUCTION DRIVE, if I can possibly avoid it, especially over a few inches difference.
Just because I've been busy doing other stuff doesn't mean I won't be reworking the pic to move the engine and prop lower. It ain't much, but I DO have a life and a family outside of this forum.