Just another fin jig
Description
Just another fin jig. Actually two jigs - one small, one large, plus an adapter sleeve. It has slots for both 3 and 4 fins, with a cutout that allows a motor clip to poke through. Small jig fits into 18mm (BT-20) motor mount, and is spaced for fins up to 3/32" thick, the most common. For thinner balsa, just add some card stock to hold. The sleeve fits over the 18mm riser and lets you use the small jig on a 24mm motor tube. Larger version is 4.4" diameter, and designed for 1/8" fin stock. It's built to fit into 24mm motor mount (D/E/F), and can be used on larger body tubes with a greater fin span. These jigs work best with fins that extend below the bottom of the body tube. I have used the small one, but not the large one.
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