the J. Roberts 3 line system was a great inovation for CL scale and Navy Carrier flyers. I've had a couple planes fitted with it, and while it does work quite well, it is quite critical that all 3 lines be the same length, and that the lead-outs be made up with the correct stagger. Thought you might be interested in this little clipping. You might want to check the measurements on the plane and handle, I've heard that the newer Brodak system might be slightly different.