I made a diapragm out of a truck inner tube,and the tire guy GLADLY gave me two of them! I took the shaft to a ag-supply store that sells assorted O-rings,and got one the correct size,for about 85 cents. Once you get the unit apart,you can see how the shaft attaches to the diaphragm. Just follow the pattern,and you can easily make your own,and have fun doing it! If you have any questions,please send me a P.M. Hope this helps!
Last edited by wetwilly5757; 05/01/2014 8:31 AM.