The breech rope was made using a technique I saw on an actual contemporary model.  The splice for the button of the Carronade was simulated.   As mentioned I am using Syren .035 light brown rope.  All of my .035 size rope is four strands.   I dont think it would look as nice otherwise.  Four stranded rope just make it work nicely.   But essentially,  the entire breech rope is made to length....3" long.   (addendum) After consideration I think the breech line should be no longer than 3".  It lo