I appreciate the reply credence. The Ark X-400 and Trex SE appear to be the same size, a little larger than the BCP I had. I was hoping for something a little larger. I want something docile and very stable. I'll never do any agressive flying I don't think. That's what made me look at the Eco 8 and Q of J QJ8. The Logo 10 looks great, but I'm sure the investment would be as well. I am looking at it hard though. I wonder about parts availability on these 3 birds? Do you know anything about the Swift? Decisions, decisions??????