Rocketarium Hydra Sandhawk Build Part 10, Booster Fin Replacement

Look at the booster fins on this picture shown earlier on the blog.
Those booster fins are very thin.

The fin stock in the kit is 1/8" thick.
That works great for the upper stage  fin taper, but the booster fins would look clumsy.

I wanted to cut new fins from 1/16" thick ply but didn't have any at hand.
I did have some very dense 1/16" thick balsa.

Here's one of the new thinner fins on the right.
It looks larger than the thicker original, but it is the same size.