[zb]
anorak:Carryfast:
IE unless I’ve read it wrong you said ‘‘why did they not just drop the top engine in it’’ referring to the 370.
…blah…You have read it wrong, mainly through understanding less than half of it. I was referring to the engine mentioned in the CM article- remember that article? The one I introduced as a preface for the question you quote?
It’s like hammering a wooden nail into a steel plank.
As I read it you were talking about the ‘range’ of engines referred to by ERF in its advertising campaign ?.Of which ERF chose only 2 for the NGC 290 and 335 NTC.The ‘range’ referred to,including the 370.The 370 being part of NTA range. 
In which case we’re actually in agreement that the NGC ‘should’ have had the whole range from NTC to NTA.However we’re obviously not in agreement about the fact that we need to gear the thing properly when we’ve fitted whichever of them.