First off if you want to do your breast hooks the easy way all you have to do is nail a piece of plywood on top of the front of your boat and then run a router with a guide bearing around the edge of the boat. Everything will work perfectly in about 2 minutes.
If you want to inset you breasthooks it is a little more difficult and takes some thinking.
So here we go.
First off measure down each side of the boat as far as you want the breast hook to go and make a mark.
Second Clamp a straight edge across where the breast hook will end.
Third take your handy angle bevel tool and set it to the angle that is created by the straight edge and the side of the boat.
Fourth Go set your miter gauge to the angle you found on you angle tool.
Fifth Cut all of your miters with that one setting on the miter gauge.
Sixth attach some stop blocks that set the plywood at the same height as the gunwales.
When you are finished with that you can attach the breasthook with glue, nails or whatever you like.
This all seems simple but it took me several days to figure out how to do it and then an afternoon to actually do the work. I still have not attached the pieces because I don't have any stainless steel screws but that should not bee too hard