Big Pete, I like the look of your tire selection but you might want to put some Take Off CS 22s in as well
I found moving the pack back gave more rear end grip, very useful in slipery conditions. I normally run mine at the back or split.
I have the Fastrax bellcranks (less slop) gear adaptor (stock gear is a bit noisy) and the underbody (essential
)
OBY has a wet set-up a few pages back, I may post my low-grip set-up once it is a little more refined
P.S. No cricket talk