Agreed
Not so much agreed.
I half agree with this Don't make a decision, just get drunk - go onto the net and order a twin scroll manifold from a reputablable dealer.
That is very strange, I rate your opinion and experience high on most topics and if I hadn't seen otherwise with my own eyes I'd take that fully on board - and I am still taking note, but the amount of times I've seen results personally which are completely to the contrary is overwhelming.
Alternatively, taking that to its logical conclusion we'd say that unless we are racing at top level there is no point modifying our cars full stop - but that completely misses the point of our hobby, we'd just buy cars to get from point A to point B and be more than happy with a stock GTR/GTS. Rationally that makes sense, but we aren't doing this because we have to.