Yep.. I've booked into the Curborough day and Missprint's National B finally came through last week.. so we are now legit..
I've completed the Sprint Series paperwork but need to list the Appendix 1 mods to the doc... I am not sure when is best to send it... I figured the latest opportuity would be to hand it in at Curborough.
Send it in as soon as you can. .. that way you should get some (or all) of the regs sent to you automatically for the events you have said you are doing.