Thanks for the replies everyone.
It would be great if someone brings out a lipo saddle pack that will drop into a T-bar style car. I ended up getting a 12r5 but i have a cyclone touring car and like the hotbodies brand so i dont really want to get rid of my cyclone 12s.
With regards to battery capacity. My friends seem to think that the track which is being run for this years nationals is going to chew through the power. It's bigger and has more grip than what we normally run on. They are gunna be strapping in some hefty motors. Personally im a little skeptical that we will need that much capacity but i aint really got any 12th scale experience so im erring on the side of their advice.
But ultimately cells are getting more expensive to buy locally in australia and i also dont trust the stock which is around. So whether i like it or not lipos are coming.