Mine has still to see a dry track, but on Sunday the club chairman and I took our F109's out on the puddle covered track with our waterproof speedo's and sealed can motors and Cross rubbers and it was a laugh.
We had so much grip on the very wet track, and going through the standing water to splash those looking on
I even spun my car in to a 3" deep puddle and drove it out again with no ill effects, so the cling film around the Spektrum RX does work
I have now put longer rear arms on my F109 as doing that improved rear end traction on my GenX10, and have also added a rear diffuser.
Bring on the rain, I'm ready