I am not a big fan of the thin Quest yellow motor mount tubes.
I understand the history behind them. Harry Stine used this yellow motor “sleeve” so 18mm engines would fit into the 20mm metric MPC tubing. They are strong when glued into a 20mm tube. But when they are used as an exposed tube (hanging out the back of a model) they're too thin and have a rough surface.
NOTE: Do not use a wrap of tape as suggested in Step 2!!!
The yellow motor mount tube WILL NOT fit into the 20mm tube with the tape around it.
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The bent end of the motor clip is set into a pre-cut slit in the yellow tube.
That small “stab” in the tube was crooked and too small for the motor clip end.
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Setting the blue thrust ring even with the end of the tube you can see the slit is a little off. If I were to use that slit, the thrust ring would extend beyond the end of the tube end with the clip in place.
The parts supplied (as is) would certainly make a flyable model. I just like my builds to be closer.
I marked the correct location for the hook end and used my hobby knife to make a slit the right width and location.
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