Does anyone know of a way to convert a slotbox fin to a us box fin. Years ago there was a kit to repair us base fin by fixing a stainless tab.
looking for something similar or another way.

or maybe something like how the fcs2 longboard fins are held in place.

Let's hear about what fins you want to use on what board?

Maybe this
www.shq.com.au/collections/other-spare-parts/products/fcs-longboard-box-adapter

the fcs adapter may be the only solution.

i'm looking for a pressure lock like the fcs longboard fins use. ie. tool less. back in the day when people broke their us bas fins they was a stainless repair kit to replace the tab with. not seen one for years.

i'm trying to enable my slot box fins to work in us boxes and vice versa.

This may help
www.ebay.co.uk/itm/Windsurfing-Fin-Repair-System-For-US-Box-/254187107534

thx elmo, that's the ticket.

wish i had a metal lathe so i could make my own.

got me thinking elmo. kinda feel i could modify this to do the same job.

futuresfins.com/products/thumb-screw-plate