In keeping with the old boat house look, I thought I'd take a stab at making a boom vang with wood blocks. The wood is sipo.

I cut the wheels using a 4" hole saw then took it to the router table to put in the 3/4" groove


For the spacers, I also routed a 3/4" groove through them


For the two blocks, one will be a double the other a triple. The ends are thicker then the spacers in between


This is how it will be assembled


I made up full size plans to follow for rounding the ends on the bandsaw and cleaned it up with a sander




Next is to run a groove around the outside to accommodate a strop with an eye.