John B., those are some nice models. And a good reason to buy multiple engines when they go on sale.

Crash B., John points out a good point regarding an all clear covering. Could make for orientation problems. Which reminds me of a kite I made with clear covering. Once in the air, if I had it out a pretty good distance, you couldn't see it. All the kids wondered how I attached a kiteline to the sky. You coudn't see the kite. But if you think you're going to always fly close in, you might be OK.