well...this is new for us this year...
1st..12th scale..as far as I know, nobody is using lipo's in a 12th scale car as they don't fit. (main stream ones anyway)
in our TC and stadium truck class....
Minimum weight limit applies if a "lipo" guy has to add weight to his car to make minimum weight... fair game.
I don't run lipo so I can't say from expierence..but from the guys that do run it at our place..this is what's being said...
Nimh have more punch at the beginning but kinda taper off as time goes on. Lipo, there is not much perforance difference from the beginning to the end of the race...or..it's not as pronounced.
Overall, we have found the racing to be pretty competitive mixing the 4 technologies together with-out too much complaining.
As a track owner, it's what we had to do to keep the most people happy..adapt with the times and waht the guys want to run. we've tried to do what we can to make it fair for everybody, and not say..well..you can run this, but can't run that.
If we were to do that, we would be diluting the compeition..meaning...let's say you have 12 guys running TC...well.... if you want to have a 13.5 class..and a stock class...now maybe you have 6 and 6....then if you break-up lipo vs. nhmh...then where ya at. so we've tried ot match up what is close. may not be exact, but close.
it's a goofy time for racing right now w/all these things on the table. I think the main thing is to be flexible and at the same time fair.
Hope this helps.