Thanks for the comments, I appreciate the help. (I'm not really going to sell it) What I should have said was the servos reached the end of travel before they hit their stops, but I see you picked up on that[:-]. I find it hard to believe the factory would set it up like that so I'm going to have to at least partly agree with both of you in that if it really were a top quality product then the guys who get them ready for market would put a little more effort into giving that appearance. Having said that, I only have the price of a dragonfly 4 invested so I'm going to take a chance. I mean, it's just a toy, after all, so I'm going to have some fun with it. I'm sure I can adjust the linkages to prevent the binding, I just hope I can leave enough travel for the thing to work. I guess that's what I really was asking: what is enough travel? Looks like I'll be finding out the hard way, which is usually how I find things out Thanks again


BT