Iowabucks44

You definately want something to cover those holes. I have a custom arm and on one windy day could here a whistle from the wind blowing into the end of the tube. Wouldn't make for usable footage. I just put a small piece of camo tape on the ends of the tubes and that worked well enough for me.

Sometimes you can find square tubing plugs like that in a hardware store in the trays that hold all the specialty type fasteners. I found some one time for using on my treestands.

Also make sure you test it out with the weight of the camera/mic before hunting. It seems mine needs just the right amount of tightening to make it perfect. There is a fine line between too tight to move right and too loose that the wind will even blow it around.

Nice work by the way.