I'd say that if you choose to run NIMH in your car and I choose to run lipo in mine, as long as mine is still above the weight limit then that's fine. I honestly can't see why anyone would want to run NIMH when the chances are the availability of good quality packs will be in short supply as they have been for a while and also the lifespan of the packs is terrible. Almost everyone I know has had problems with cells going down in packs over this last season and the problem will only get worse as more and more cell distributors go over to lipo....... of course, this is just my opinion