Here are a few more pictures and the 16 inch measurement for the start piece was probably a little longer as they were cut angle shown would indicate about 2 inches longer tad it was cut off at the bottom so if you start with cardboard 18 inches long it will work out with the angle and you won’t need a longer piece of metal .I also welded little wedges were the piece was cut out for the choke for strength .Hope you can understand my jibberish let me know if you need me to ramble more Kevin
