Sand the glued end square with 400 grit.
This end will be exposed, it is not a glued surface. The CA glue seals and hardens the tube end.
The engine hook slot cut is made in two steps.
Note the blade is flipped over making two small joining cuts.
Stab and make about half the cut.
Turn the blade over and complete the cut from the other side.
The two facing cuts give you a slot with squared ends - less chance of a tear.
For whatever reason, Estes didn't include an engine block in this kit. I added one.
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