Surfboard fins 757 (Afterburners)

The outline of these fins is a taken from an old fin design called a 757 fin as they are the same basic shape as a jumbo jet wing.

i have added 3 slots to the outer fins for less drag? but more because the something new and am nicknaming them Afterburners.

I print these upright with the leading edge to the bed and just gave them a lick of varnish for protection.

I have rode them but on my second wave snapped them on the bottom turn just above the tabs. They were printed in PLA+ with 50%