Just spoke too the guy at the hobby shop who had a look at my plane. The feedback was as follows:

They set the low and high end needles and made it a bit on the rich side - he said he feels safer with the engine like that because as soon as the engine gets hot it seems as if there is no pressure/back pressure in the exhaust (Apparently this could be that the engine got too hot at a stage). They tested the engine in the yard and it's working fine now..He said the engine will tend too rev higher when the plane pitches up - but that is the way it should be he says. When flying level and straight it will fly on a more of a rich setting. Apparently the exhaust was a bit loose (but I think it was because of the nose dive it took into the earth). Apparantly (I think he said exhaust gasket) was also broken - don't know if this was before or after the "crash".

They are going too maiden the plane hopefully this weekend. I'm hoping for the best.