Semroc Laser X, KV-33 Build, Part 3, Engine Mount

The engine hook slot was a stab with the tip of an X-Acto knife.

TIP: I like to square up the opposite side of the stab using the backside of my X-Acto blade. This prevents tearing of the tube when pressing in the upper bend of the engine hook.

Stick the knife in the opposite narrow side of the cut and square up the left side with the dull side of the blade. 

GOTCHA: The pre-cut engine hook slot was too high on the tube! 

The lower bend of the engine hook (and engine) should extend 1/4" below the end of the tube.

I cut a second lower slot so the hook would end up in the right position. A drop of glue was set over the first wrong cut slot.

The fit of the centering rings was tight so some 400 grit sandpaper was used to open up the diameter.

The instructions don't mention it, but a small notch could be cut on the inside for an easier slide over the engine hook.

Here's the finished engine mount.

The end of the Kevlar line gets a loop knot. The open end of the loop is slipped under the upper bend of the engine hook.

Notice the re-positioned engine hook now extends 1/4" below the engine tube.