centre box removed - nice
much nicer sound without being silly loud, the car is a fairly hefty chunk of metal lighter, the centre box doesn't knock against the car going over bumps etc etc etc.
It's quite surprising just how little work those back two boxes are actually doing in the way of noise reduction but without them, the car seems to rev a little bit more freely.
The 'prototype' pipe I lashed together this afternoon doesn't quite fit perfectly but I'm going to have a chat with a local exhaust builder on Monday or Tuesday and make a whole, one piece (unsilenced) rear section.
If anybody is interested in one of these - let me know and I'll see if I can negotiate a decent price