Sirius Interrogator Build Part 2, Engine Mount

Nothing out of the ordinary with the engine mount.
The Kevlar was tied under the forward centering ring.

TIP: The instructions did teach me an better way to measure the correct length of the Kevlar to prevent a possible zipper.
Typically, I'll tie on a length of Kevlar to the mount and roll the Kevlar inside the engine tube. Then the mount is glued in place.

The Sirius method is simple and makes more sense.
With the Kevlar tied on, set the engine mount beside the main air frame tube.
Estimate the position of the mount when it is glued in place, usually with the engine mount tube 1/4" beyond the main air frame tube.
With the Kevlar taut, tie an overhand loop so the Kevlar won't extend beyond the top of the tube. Cut off the excess Kevlar tail.

Previously -
I would tie on the Kevlar then glue the mount in place. I'd feed the Kevlar through the front of the tube and mark here it meets the top of the tube.
Then feed the Kevlar out the back. An overhand loop is tied so the mark of the Kevlar is at the top of the loop. The elastic is tied to this loop.
After all of that, the shock cords are fed back through the back end of the engine mount and forward out the top of the main air frame tube. Whew!