Thanks YmeBP I didn't noticed Losi had composite 8-Deg composite carriers. I'll just have my LHS get them in. If they can't, I know where to come. I thought I searched for them last year when I thought of trying more front caster but I guess I just missed noticing them.
As for the more caster I just want to experiment. With my driving style and the high bite carpet we have during the winter I think it would be really good. Plus you don't know for sure until you try. It could be a total wash but it's fun trying to find the new limit. Never give up on pushing the limit!