So, here's my take on your new tunes:
Z06/Tuned: Very nice handling, I managed very high corner-exit speeds with this baby, because it handles so well. A very balanced tune, no nasty surprises anywhere, it lets you know way in advance before it's even considering to let the back slide out. I only wish it would go faster! Which it can't, as I already discovered with my own Z06/tuned tune. Not without throwing the excellent handling out the door anyway.
Gearing is also excellent BTW. 👍
Viper/Tuned: Again, very well handling and excellent speed through the corners. Handling is very balanced, again no surprises of any kind along the way. One thing I have to ask: 6th gear seems a bit off compared to your other tunes, which makes it lack top end. Any special reason why it's like this? Still a very good tune, but this thing has me wondering if it can be faster on the straight with some slight gear adjustments.
GTLM: No surprise, this baby handles also very well. But contrary to the Viper and Vette, this baby does have some surprises along the way. It will stab you in the back by fishtailing if you're not careful. It's labeled 'NFB' (Not For Beginners) for a reason. This baby will serve you well and is blazingly fast, but don't ever step across the line or it will kill you. Gearing is top notch, as usual. Very good stuff, but a handful.