Me too. It's the only thing holding me back from chasing more power. To get it between 350-400bhp (the sweet spot I want), I need a new, bigger turbo. But that's going to mean more lag. Which I really don't want. Trying to find a turbo that can take me to that sweet spot while having a fast spool is looking impossible... & that's a hell of a lot of work & money to get a twin scroll set up!
Think ill just get the centre de-cat and a induction kit fitted to make it as strong and responsive as possible with its current set upvand leave it there.
Anyway I digress, one of the most impressive engine bays I've ever seen! And a great thread documenting the work you did. Absolute top job!