Yeah, have to say i am indeed a happy bunny...
thanks to the collective minds over on .org i think iam getting to a point where i can plan to start to get some bits together to fashion something.
will go with an external wastegate, as it can be boost controlled and i have already got a boost line plumbed in.
however it will need an adaptor to be fashioned to have the boost feed, and also to attach the wastegate itself.
then by using trial and error with some blanking plates with holes drilled in them eventually work out a way to limit the amount of gas that passes through the outlet.
When the diameter is worked out then i can look at a proper pipework solution.
Either leave it as a bling screamer pipe (with restriction via a plate) or just get some pipe work that is the right size and feed it into the downpipe with it's own flexi joint...
So ideally i need to find a machine shop\welder in the bristol area to manufacture a few bits for me...
and on a plus note i just dropped my clutch pedal to only be slightly higher than the brake with Mattieprice's little kit - bonus