too tight to slide onto the motor mount tube.
The inside walls were shaved wider using a #11 blade.
Shave a bit, test the fit.
You want a tight fit on the engine mount tube.
The fit of the plywood centering ring was tight and needed to be slightly widened.
I shaved a bit off the inside diameter for a tight slip fit.
The rings were slid into position at the recommended measurements and glued on using medium CA.
The third upper ring was glued over the face of the baffle plate.
The fin tabs wouldn't fit into the fin-lok rings with the rings at the recommended positions.
The instructions say the front edge of the rear ring should be 1 1/4" from the rear end of the tube.
GOTCHA: The front edge of the rear ring should be 1 1/16" from the rear end of the tube.
Look to the inset picture at the upper right.
I had to cut and extend the lower notch up about 3/16" for the fin to snap into place.
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