The tube cuts weren't perfect.
Joined by the coupler inside you can see some gaps.
The ends were sanded flat. The inset picture shows the better fit after truing up the tube ends.
The coupler was dry fitted to see where the engine hook would sit. That's a pencil mark on the lower white tube showing where the notch would go. The coupler would slide in halfway and butts up against the top bend of the hook.
I punched the top side of the coupler for a Kevlar line.
(In the inset picture the coupler is flipped over, the top is at the bottom)
A shallow slot was cut from the punched hole to the top of the coupler for the Kevlar tie.
The slot has to be deep enough so the Kevlar won't bulge out the upper tube. Don't cut the notch too deep or weaken the coupler.
The tube joint got a coat of CWF and was sanded flat.
There was a little sand through and some fuzz.
CA was wiped on over the joint and the hardened fuzz sanded smooth.
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