I am going to do a rebuild on my spare TT motor with bigger injectors, forged pistons, bigger turbos, possibly JWT cams, etc. and I have been offered a pair of APEXi T30 ball bearing turbos, which have had very little use, at a VERY good price. Has anyone had any experience with these turbos, and how suitable are they for a Zed. Also, what should I look for when inspecting them prior to purchase.