To start, Isn't that knock sensor replacement a PITA?
Twin Turbo, that's a whole system that many cars don't even have, so there's that level of complication added. Dual MAFS and other sensors too right? It's not that a MAF is all that complicated, but then doubling up must add to the complexity a little bit. I think all the little bits that seem just a tiny bit tougher, like the tight engine bay and more, add up to make the overall that much harder to deal with.
I think you might get more conversation in the Z32, general discussion, the engine forums are used less and more specific, but I don't know.
Anyway, I think it's awesome that you tackle these engines with no fear.
Welcome to NICO Club!