Palessi,
Thanks for correcting me on that. Wasn't meaning to mislead. I didn't take into account the 1.0 and 2.0 mills. Other than that I think I was on track.

Amezcua,
Not 100% pos. on power box that A-Main has listed. When they first got the Ex-Tech.s in the descriptions weren't very clear. I think they corrected that, but I haven't looked.
The power box is a very good deal if you are in need of a new pipe to go with the motor and the power box comes with a clutch set up (another plus). Even if its only the "Race Prepped" version, its still worth it. If there is a full modded motor in there, even more so. I haven't run a full modded Ex-Tech yet so I don't have any info to say that its better or not. Haven't run the Ex-Tech clutch setup either, but I do like the idea of the spring tension adjustment.
I run the "Race Prepped" motors and that is plenty for me. I don't feel the motor is lacking in any area, mostly it is I that is lacking out on the track.