Well, I just ordered an external wastegate for my ng900. Going to ship it off to GS as soon as i get it. Then he's going to build me a manifold for my holset, and it will be pretty epic.
the wastegate i ordered is the synapse engineering synchronic 40mm. i've read a lot of good things about them, and will probably get getting one of their bov's as well for this car, to replace the ssqv.