"I have used the GB24 boxes in all my builds for six months. I love that they have different cants in the box, so I only need to cut one even hole when using the high-density insert. Most of my boards have many double concaves and/or channels with VEE, so with this system, I can play around with the different angled fin plugs to find the perfect one.
The last board I built was an 80s twin replica with a huge amount of vee and channels. I reversed the 4-degree box, which gave me the exact cant for the fins I wanted. The jig also came in handy here, as it has little feet you can take in and out, omitting the need for shims. The jig is also clear, so you can see what you are cutting.
I also make my own timber and fiberglass fins. I only used glass-on fins on my boards before. Now, with a full slot, I can make a timber fin with enough strength in the base without worrying about cant.
I also found out that the box is very strong. I landed on a rock in the last swell, and the fin split at the top. There was zero damage to the box or board!"
