RE: GREAT PLANES ULTIMATE (kit)
Mike ,
I just followed the plans with my SAITO 72.
I've seen some people mounting the engine invertred too.
I don't think that there will be any problem you will only have to search for the glow plug any time
you want to start your engine.
If you insist on inverted maybe a remote glow plug connector will be better to use.
Thanos.