Leo made this nice jig for cutting gussets in half. Lots of gussets are used on each rib, and lots ribs are used. So, if my math is right, lots of ribs X lots of gussets = gazillions of gussets.
A round gusset, and the jig are sitting on the jig saw, sorry for the pun.
Gusset is inserted into the jig. By design it only goes in halfway.
Jig is flipped over, and jig saw is used to cut gusset in half, guided by the edge of the jig.
Note the nice hole for pushing out the other half of the gusset.
Voila. The process is quick, and accurate.
If you look closely, you can see a piece of cardboard was glued into the slot to make a snug fit for the gusset so it didn't fall out during cutting.