maybe let people know your current set up for other to advise - I am interested in your thread so glad you posted as i also race indoors on the same kind of surface at cullingworth, much smaller than say bury where I also fancy trying out but still enjoyable.
I am a newbie and I run the yokomo bmax 2 ver2 as a mid motor car, although rear motor is good for slippy surfaces. A ball diff again works well apparantly for slippy floors although I don't have experience myself on it.
tyre wise I run Schumacher mini spikes yellow compound on front and rear.
the more experienced will be able to give better advice than me pal