Forgotten about this post!

Digi yeah i think your right with the spotlight - i sometimes find it rubs on the bonnet though when its opened which is pretty annoying so it usually ends up getting pushed around a bit!

Yeah you can run a DV on a TT mate, even on 6psi. I run one but its not shown in the pics as i was awaiting a diaphragm. Used to run a bailey one and now use a forge diaphragm type. It works the same as any other turbo car so there's no reason for it not to work.
I would suspect a problem with the vacuum line - where has this been taken from? I originally connected mine to a small take off thats blocked as standard on the inlet manifold, but i found it would never dump! I then found that this take-off was totally blocked with years of gunge! once clear it worked fine.

thanks for the kind replies chaps!!