Chris08527: I would look at some set-ups from some of the guys in Europe on the Xray site.
Yes i have run the jaco greens, they have a lot of steering so when you go from most tires to them you will have to take some front grip away from the car. On carpet tires dont slow down after 1 run like on asphalt, I have had Jaco greens that were just as fast on my 15th run as on my first. But if i had to pick a run I usually like the second run on carpet. I have only run handout tires for the last 5 years so i dont know what the hot Tire/wheel/insert is anymore. but i would try to get everyone at your place to go to a controlled tire, that is what we do at my track and everyone loves it because they dont have to glue tires and they wear much better and you dont have to try every tire with every insert to be fast.
Thanks, paul