Just to update everyone,
I found the problem with my high current draw.
A dead FPR, a new VW was in about £50 mark so I got an aftermarket, adjustable with fluid gauge, for £32 from ebay.
Seems to work ok, its also fixed a few other problems I had repoerted like running rich, black smoke, so this coudl been the cause for a lot of my issues during building.
I think it all works now, but havnt run it up to much as my engine is caked in fiberglass dust, which I dont want to bake on.
I now back down to a 10A fuse dedicated for the fuel pump.
Think I need to take the time and give my engine a vacuum
