Eh? Nonsense, the TT setup worked flawlessly. Yes, it doesn't deliver the power or the kick up the ass of a single large turbo, but turbo 1 spools up just before 2000rpm and turbo 2 at 4000rpm, meaning power delivery is seamless from about 1800-5500rpm band, which is very rare in a turbo car to have a power band that wide.
Unless you're using it for racing, you'd be mad to swap out the twins for a single, the inline TT setup was awesome and spectacular whether driving around town or flying down a B road.
If you can't tell, I owned one of the TTs back in the day when I was living in the UK