Summary

This project is a tubing coupler that is designed to hold ejection electronics for your rocket that fits Estes BT-55 tubing.

There are two models 1) coupler, 2) end cap.

There are three versions of the coupler 1) 3.5mm wide BT-55 band, 2) 7mm wide BT-55 band, 3) 10mm wide BT-55 band

The end cap has a hole in the center that is 3.5mm in diameter and one that is offset by 6mm from the center.

There are two lengths of couplers 1) 60mm (2.36 inches), 2) 120mm (4.72 inches)

File added on 26JUN2022:
1) End cap with hole offset 7mm from the center and integrated ejection well. No hole in the ejection well, but drill your own and insert the wires and add epoxy to seal it.