That oversized wastegate hole is no big deal . My exact same turbo's wastegate hole was slightly misaligned for my puck and fixed it with a plate like Sweet6 suggested . I got my blank from Bison and put the hole exactly where it needed to be . Make the hole no larger than .9" to start or you may not be able to build boost over 24 psi , and that's another story !
Nice turbo , I love mine . GLWS , Sam