Hi Dave,
Thanks for your post.

Well, I won the auction and I'm happy with the price - £37 or about $70 delivered. I've also sent another email to Pete @ WackerEngines asking for their conversion instructions and an idea of shipping costs for a mount and a hub. Unfortunately I don't have any machining facilities and I'd rather have something that's proven if I'm dealing with an 18" prop @ 7000rpm - eek!

I'm not sure if the UK model design I'm thinking of using will be o.k. to mod for the Ryobi so I need to e-mail the designer just to make sure. I think it may be lacking in wing area from what I've read during my searches here but I can always run it past you guys huh? I've attached the advert for the plan of the SportStar and am open to comments & advice.

No doubt I'll be back soon with some dumb questions - no matter how hard I search lol.

Cheers,
Steve