Well, I thought I'd have a video to add tonight. Glad to read on how to set up a you tube account anyway. Now, I do have a video but it is not pretty! I had a live launch today! I had the guidance lines hooked up to the bird house and to my quad with the rockets attached to follow them to the target (bird) house. All was stable in a hover, I backed up the craft to tighten the lines, still stable, so fired off the left rocket. It launched perfectly but initially pulled slightly to the right and of course pulled the line with it which turned the quad to the right as the line was attached to the left landing gear. The rocket continued on and it hit the bird house. The quad could not recover and spun two turns and crashed. No real damage...broke a prop and bent up my right rocket launch rail (coat hanger). All is repaired tonight ready for another launch tomorrow but without the guide lines. I'll still fire the rockets separately, and the only 'feel' the quad should experience is a slight CG shift which is less than a gentle crosswind during station keeping.