Thanks for the valid advice mate, much appreciated. As said, I've only done what I set out to do, fit the turbo and keep it on standard boost, advising him not to run it stupidly until its booked in with a reputable tuner. Never said I'd map it or anything along those lines, simply fit it.
So at least he's aware that after its fitted, I no longer have any involvement.
@ stevieturbo
You're a cunt