It is not as simple as you think, the barrel has to be the right length, too long and it takes too much air, too short and it is hard to play. You also did not add a lanyard groove to the ones you made. They really need some sort of band, brass and aluminum are the common ones, without bands the barrels can split. The finish has to be durable, it needs to a finish that can take the abuse of a duck hunter that is in the swamps, marshes etc. while hunting.
They are tools, if not properly made, they are useless. Just like a pen, no ink, it is just a fancy "stick".