You can buy a pre-made fiberglass fin box (finbox?) for your IOM sailboat for about $150, or you can make your own. The pre-made one might fit your fin if you trim it perfectly enough, but the home-made one will fit your fin perfectly if you are careful while you make it.
To do this whole process though, you'll also want to have an IOM fin alignment and measuring jig. It makes all the alignment steps so much easier and accurate.
You'll also need an fin, a bulb, heavy fiberglass (I use 6oz. from kayak building instead of the 1.4oz I normally use for RC sailboats. If you only have lightweight cloth then you'll have to do several layers), epoxy, etc...
To do this whole process though, you'll also want to have an IOM fin alignment and measuring jig. It makes all the alignment steps so much easier and accurate.
You'll also need an fin, a bulb, heavy fiberglass (I use 6oz. from kayak building instead of the 1.4oz I normally use for RC sailboats. If you only have lightweight cloth then you'll have to do several layers), epoxy, etc...
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