You are leaving yourself wide open mate. There are dozens of T3 variations.
Stick with the tried and proven combos.
GT2530 for example
yeah i know what u mean. i was going to keep it twin turbo but a brought a garrett gt 3545 from the US about a year ago, have the manifold there 45mm waste gate and all the other mods that go on when replacing a bigger turbo so i might just use that then staying with the twin set up