I'd say no Damo (but I ain't a tuna

), unless you were moving up a stage to nearer 380+ and you're trying to squeeze a bit more out of a T34. But of course there's more turbo options around for that spec' thesedays too......
Matt, as said above I do think you're right

(I actually think we are both right and for the same reasons, but stand to be corrected if wrong)