sv2 indoor tracks undertray? Chassis skins?

[wildoliver]

We will be racing at York this winter with a pair of identical SV2s, they are nearly built and ready but I'm in a dilemma about the undertrays, on the positive side they provide strength to the shell and keep the inside of the model clean, but on the downside they must trap heat and I know I'm going to get sick of them coming loose as the rear bumpers degrade. I also don't think they are needed on a clean interior track?

Thoughts?

Can you get an SV2 chassis skin to keep the chassis in good condition?