I'm aware of carburettors thanks
Rather than a spray of fuel going in with EFi, it's a big shower of fuel. Not exactly accurate, neither is fixed timing. I see it as a step back in efficiency from standard equipment on a Mk3 Polo. Fair enough your trying to make a turbo work, but why not do a good job in the first place ? You say that you don't have £600 or whatever to spend on G40 stuff, but if you might end up spending more than that on replacing broken parts and rebuilding things.
I must admit I almost take offence at that comment, and I hope I didnt cause offence with the 'ask your dad' jest.
Carburettors are fine on turbo cars as long as you pay attention, I have a wideband AFR setup so getting the carb to deliver the correct amount of fuel should be relatively straight forward. Bear in mind that people have run 240bhp on these carbs.
The fixed timing is also a cheap and easy solution, which compromises only efficiency.
The digifant system in my eyes is in no way ideal either, and I cant map it myself. Plus I know relatively little about it.
But please rest assured, I am probably less likely to melt an engine running fixed timing and a carb than I would be with the digifant system, simply becuase I can tune what I have now at the side of the road.
What can I say, I enjoy messing with stuff. EFI wouldnt quite be the same for me unless I made it myself.
To give you an idea though, My carb was £30, Cosworth IC was £20, Turbo was nothing, (although the turbine housing and turbine wheel I have fitted cost me £30), I have made my manifold for the cost of the bends (£20). The car cost me £340.