How big of a board do you have? I have an 8ft and use these guys:

https://www.amazon.com/gp/product/B00AA87DO8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

It's expensive but worth it; I'm sure you'd be fine with a few bungees. It's all quick release so you can still fold

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