I've got one of these Turbos - ran 371bhp at 28 psi on my greys and NMS chip. No other major engine mods (standard cams / head etc)
It's the perfect balance between the T34 .48 and the T34 .63 - good power and minimal lag. Plus the price is very fair too - mine was around £800 or more and a T3 Turbo.
Apologies for jumping on your thread Mike - just putting my 2p in as usual!
Cheers
Simon