These are really handy and pretty easy to make. A nice addition to any Commander or Ariel. They just pop on the combings and you can move them wherever you like - inboard or outboard. All you do is run a piece of 8/4 mahogany stock through a table saw with a dado blade set a little wider than your combings. (it might take a couple of passes) Cut the top piece with a hole saw and a scroll saw and the bottom piece with a table saw. Clean up the edges with a router, glue the three pieces together with epoxy, a few coats of varnish and voila - can holders that look like they are original equipment. A made one large enough to hold a wine bottle and also a removable cockpit table.