After the wrapped strip had dried, the rolled over edges of the strip were sanded off.
The rolled edge was sanded off on the 20/50 ring to the left. The 20/50 ring on the right has yet to be sanded.
The inside diameter of the rings are still too small to fit over the ST-7 engine mount tube.
(The Centuri ST-7 tube is a little thicker and wider than a Estes BT-20 tube.)
The tip of my hobby knife was used to peel off a thin inside layer of the ring.
Take off very little. You can always go back and peel off more after checking the fit on the ST-7 tube.
I did a "Bradycros" and removed a notch from the top of the engine block to fit around the top bend of the engine hook.
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