The 12 double will be a bit of a handful at Tiverton so turn down the power if you can. I would recommend a good 19 turn with an overall ratio of about 8.2 as a start point.
Set the ride height at about 5-6mm and don't be precious about your carbon fibre. If you are looking for tyres CS27's work well for me.
Anything else I can help with you can email me on
[email protected].
Looking forward to seeing you racing soon.
All the best
Gary