This is the finished engine mount built as directed in the Estes instructions from Step 1.
Mr. Wilfong's Kitbash instruction drawing shows the BT-20 engine mount tube as 4 3/4" long, but he doesn't mention using a longer tube in his version of the instructions. I went with the supplied length from the Bull Pup kit at 3 1/2".
You can see there is a notch for the engine hook in the lower ring. There is no no engine hook supplied in the Bull Pup kit. While the Estes instruction drawings don't show the notch, I would assume Estes just went with a generic ring set that can work with or without hooks.
I don't use Estes "Tea-Bag" shock cord mounts. Kevlar was tied around the upper centering ring. A small hole was drilled for the Kevlar to pass through. I should have put the notched ring at the top and feed the Kevlar through the notch!
That brown lip on the end of the BT-20 tube is CA glue. To increase strength, I always run a bead of thin Super Glue around the ends of body tubes and lightly sand smooth.
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