Horizontal Trim Fins Without Tips?

[homer bell]

Those are expensive and time consuming to make, factory saves money, you save build time. They will prevent personal injury, I have a big scare on my neck from walking past an old design with nothing on the end but a sharp corner. Of course that can be rounded out with more work if you want, I’d recommend that if you don’t put any winglets on there.
I doubt they do much for flight stability.?