After losing a few parts over the years,
I keep like kit parts in small zip-lock jewelry bags.
Fins, launch lug and dowels in one, all the tube details in the other.
You could put the dowels in a drill and spin them against sandpaper to round the upper end. But, you run the risk of scaring the dowel sides in the drill chuck.
I spin the dowel ends against 200 grit on a sanding block. It's not difficult, just takes a few minutes.
The dowels are glued into the notch on the outside edges of the fins. Pressing the two against the flat sanding block insures the dowel is glued on straight.
I thought these fins were a little thick for 3/32" balsa stock, but they are the same thickness as the dowel diameter.
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