As said before the same tube but longer was used in the Venus Probe. 25 years ago, I also noticed a tube of the same diameter and thickness used in the AAA Transonic 775, which I used to repair my original Skywinder after a weak ejection in an MRC motor failed to deploy the blades. The first picture shows a piece of one of those tubes on right, and the Replacement tube TT-20+ in the center and the BT-20 on the left. The second pic shows a test fit of the BT 20 fit onto the stop inside the slide, with the TT-20 plus over that, still loose. The AAA catalog page shows the correct tube could be had back then, “BT-20HD”.

Attached Thumbnails