Decided that the Forward Centering ring should have an “AFT” fillet. The “Forward” fillet was created by the initial gluing process; as the glue was pushed forward. So nothing needs to be done here.

The creation of the fillet is not straight-forward because it was all the way down. So instead decided to lay ~35 ml of Epoxy resin using tube and allow it form a ring. So not a true fillet in the sense (not shaped like a fillet), but still forms the role of a fillet.

The preparation

I taped up the Motor-Mount and Airframe where the AFT centering ring eventually needs to be glued (didn’t want this getting clogged up). I also pushed a bunch of newspaper down the Motor Mount and taped over it with Masking tape. Didn’t want ANY glue accidentally getting into the Motor Mount.

The Gluing

The Epoxy was just 105/206 mix and inserted using long doweling with 5 mm (internal diameter) plastic tubing. I secured the rocket to the bench using cable ties and let it sit there for 10 hours.

It was very straight-forward procedure