See...!!! This is why we DON't aprove group buys... there is too many unknowns and too much of a hazzle!
I know JLT is in a heep with former customers (CAI and tuner) wanting more, new, updated tunes... help yourself and get your tuner from a professional tuner with more than a coouple of canned tunes!
You'll probably get a 'safe' tune from any (manufacturers) canned tune, but as mentioned MAF housing, overall size, filter intake area, etc etc. differs... so for the perfect tune, again!, go see a professional tuner!
With the X-Cal-II you e-mail your data log to you tuner (if he's not local of course) and he'll 'fix' it then e-mail you the new tune and you're on your way!