with doublke hoses ther is a 1.5 inch end and a 1 inch end. why niot make an adapter that fits on the mouthpice and reduces the need for a 1.5 inch opening on the hose. This way one needs only one inch on one end, one inch on the other end. It would mean anextra clamp or cable tie, but it may provide us with a more readily available and less expensive solution to hoses
Just my two cents worth