OK...here is a part that I am making. Here is the mould. I did it with the EC gelcoat and paste for high temperature, anticipating that I could then use it for hand layup and prepreg. I am making my first part by hand layup (because I need to check all dimensions are good at the end). But man it was a mess with all the shapes...do you guys think that I would really be better with prepreg or would it be just as hard ?
Thanks !

Yeh it's super tough to stomach going back to wet-lay after having worked with proper pre-preg. Hell, even infusion is just a bit unpleasant with all the extra consumables etc. 

Wait till you've tried tooling pre-pregs! Regular tooling is just agony after that.