Hi Tarnish, I'm involved in operations at Leading Edge. The best thing to do is call Douglas Gilmour, he is one of the owners of the Decathlon and the resident tailwheel/aerobatic instructor. I'm sure he will be able to sort you out. Call Leading Edge on 01236 727727. He is scheduled to be in all day tomorrow. If you can't get a hold of him P.M. me and I'll pass you on details to get a hold of Douglas directly.
Cheers,
Paul.