The string method was what i used before i had free access to tracking at work, tracked it at work and was under 0.5 degrees out from what i was aiming for originally, that's good enough in my eyes. 1 degree toe in (per side, so 2 degrees total) is manufacturer spec, it's to promote understeer in poor grip conditions. I'd suggest 0 degrees - i reckon you'll find the handling a bit more pleasing and it will also bring minute benefits in mpg and tyre wear.
Looks like it's all working mate, nice! When does it hit full boost?
Looks like it's all working mate, nice! When does it hit full boost?