Thanks guys, so much for your info! uonlylivetwice, thanks for that lesson in engines & props......I'm starting from the ground up (appropriate analogy, don't you think?) so everything is new to me.

Crash Master & Markman, being so new, I didn't want to tackle a build in my first sitting. I see on the spad website that there are people that will build them for you. Any experience with any of them? Markman, did you build or buy?

Thanks again.