Dr. Zooch Ares I-X Build, Part 2, ACM and Couplers

It's a good idea to number the instruction sheet pages.
The loose sheets are easy to get mixed up

You make couplers from the 1" long BT-20 tubes.
Another one will be needed for the engine mount so go ahead and make them both now.
Mark a straight line down the tube and cut through the tube down the line. The tube is short and thin, you can use sharp scissors. Slide into one of the other 1" long BT-20 tube sections. Mark the overlap.

Cut off the overlap. I tend to cut short (inside the drawn overlap line) and sand with a block to a good fit.
Check the fit in the BT-20 and sand if needed.






Here's the finished coupler slip fitted into the 1" long BT-20.

Making couplers from body tube segments is a good technique to know. It can come in handy when you don't have a "real" coupler.