

How to get square nut out of Skatinger fin
Hello! I bought a Skatinger SUP this summer and accidentally broke the fin off on my second use.
I bought a generic replacement fin uses a smaller screw so I can't reuse the square nut that's already in the fin track.
No matter what I've tried, I can't for the life of my get the old nut out or get the new but in. There's got to be a way to get it over or under the ridge that stops the nuts from falling out, but I can't figure it out.
I've tried it deflated, partially inflate, fully inflated, using a wide screwdriver to open the track more. And nothing works. It's basically brand new so there's no sediment buildup.
Any tips on how to get nuts in and out of the track?
Thanks!