My second plane was a Jumpin' Geo (feature twice in the RC magazine). It was originally designed and built for fun fly events.
I love my MDS engines. They haven't gotten past the breakin stage so I've only had 5% through them. I'll post on here in the engine forum if I have any problems with it. It'd be a few weeks as I have another set of projects going.
Sorry to hijack your thread, but 'A & B certificate'? What are those?
G