just read through your post and the setup looks amazing as it as been said you should start to make some more of your manifolds as im sure people would purchase them due to the quality of them.
any further info on your car is it all going ok on the reliability front, an also did you reach your desired bhp figure?
Sorry for the late reply, we moved house 2 weeks ago any only just got broadband back!!!!!
I've thought about making some more manifolds and I've been asked for a price, problem is no one will pay what I'm asking.
Power wise, after asking a few mini tuners who have knowledge in this setup told me there is no way you'll see more than 130bhp at the flywheel, which is about what we have. I've seen no proof with dyno figure to see any other supercharged setup with anymore power. At the end of the day its driveability that counts not massive bhp which can be unreliable!!