Hi Darren
For TC's we're running white carpet dragons at the moment with medium inserts. No sacrifice of grip with them as the floor now has a matt varnish finish and recently grip has been enough to roll the cars!!!!
Pretty much like driving foams on carpet these last few weeks.
New minipins struggle now for a few weeks until fairly worn then work for a few until worn out the Dragons will last you a couple of weeks no problem - to be fair they'll probably last 3-6 months
As for buggies, I'll nudge one of the buggy lads to post a suggestion as I'm not sure what they're running
Hope to see you again when you're in the area.