Estes Constellation Build Part 3 Engine Mount

Onto the forward centering ring - 
I'll be using some 150 lb. Kevlar in addition to a longer replacement shock cord.
The forward centering ring was notched with the side of a small rectangular file. The Kevlar will loop through this notch.

The old instructions have you glue the rings even with both ends of the engine mount tube. This would put the upper ring just past the top of the engine hook. I'd rather have the ring overlap the upper bend of the engine hook.
A slight notch was cut into the low end of the upper ring, directly opposite the Kevlar notch.
The inset shows a wire used to keep the Kevlar notch clear of any glue.

There is't much space between the BT-20 mount tube and the BT-50 tube. With such little clearance the Kevlar isn't knotted. A knot could show as a bump oustide the BT-50 tube.

The Kevlar tail was wrapped three times around.
To glue it in place, pull the wrap tight then slide the Kevlar away from the forward ring.
Apply a glue fillet around the forward ring joint and let it set up for a few minutes.
When the glue is partially dry, slide the Kevlar wrap into the glue ring.

After the fillets dry, trim off the excess Kevlar tail.

Here's the finished, upgraded engine mount ready for installation.