Decided to keep busy while I wait until KBM has time to sort the diff installation, by sorting out my charge pipe situation. Bought a n55 aluminium charge pipe from Hell BM, happens to be ESP one, drilled a big hole in it, got a turbosmart flange welded on and it fits a lot better than the old one did. So for anyone that can't find a charge pipe to fit a specific type of blow off valve, just buy n55 e chassis charge pipe and weld on the flange that comes with your BOV, n55e chassis and n54 is the exact same shape, n55 just doesn't have the dv ports.
Looks a lot better, am still waiting for 6mm vacuum line adapter to get reference signal to bov then will test to see if I get any leaking or fluttering to see if it has the correct spring in it at the moment.