Nice to finally see your review. I went ahead and ordered the GTZ even though I already own the V2. I'm seeing too much variance between Core #0 and the rest of the cores on my quad w/ the V2, the most variance showing up between core #0 and cores #3 and #4. I've remounted multiple times w/o seeing much difference and this variance wasn't as great even with my TRUE. I also like to use my compression fittings finally! Thanks Martin.