Base setup for Stotfold?

[orinoco]

I'm due to race at Stotfold in the oOple series at the end of the month but have never been there before, don't know how much grip there is or how bumpy etc. Has anyone here got any experience/setups using an S104 at the track. I'll be using the standard saddle layout with 85g behind the batteries, until I get my performance kit fitted.
Cheers,
Col.