I made a little modification to my sunshields that helps on the bright sunny days we've been having. I originally designed it to cover the top and extend beyond both the front and back of the chronograph, but I was at the range early today in order to beat the heat and the sun was so low in the East that I had to hang my cover over the side instead.
It worked like a charm. I couldn't get any readings with the sun shining into the sensors but once I hung the shade so that it blocked the sun I had no further difficulties.
I used rebar tie wire to make the supports and sewed some velcro onto the cloth so I can attach it over the top or down the side as needed.