I am now trying another source of diaphragms, and have modified my original pullrod assy to take a loktited 10-32 stainless truss head screw instead of the staking method. (Apparently some take a nut). So far it looks good, hooked up to the fuel lines and pressurized with electric pump, no leaks by the diaphragm (unlike the staked Then & Now diaphragm which leaked profusely through the center hole. Will run it up tomorrow and then keep an eye on the oil level to see how well it holds up.