Another of their points is the small diameter thick shaft versus larger diameter thin shaft. The thicker shafts should be more durable. However,I doubt that there is that much of a difference.

The thinner shafts will be less affected by crosswinds at long distances. This has been proven in the real world and isn't just in a box testing. That's why regular carbons are in general smaller than aluminums of the same spine. however, for the distances I shoot at game it's a non-issue.

The purpose ofHIT is to put the insert in line with the shaft and therefore having better tolerances. However, if you've ever tried to slide the insert into any of today's carbons you'd know that they have pretty good tolerances themselves. On the GT's you have to smack them pretty good.

Ithink it's simply a marketing idea to try and separate themselves from other manufacturers.