There are other air governors available besides those manufactured by Bendix.... Sealco and Midland are two that come to mind, The Sealco unit is more user adjustable than the others. It is factory preset in cut in at 100 psi and out at 120 psi, but it can be end user adjusted to cut in from 95 to 135 psi and a rebuild kit is available for those that like to tinker, maybe it's more what you are looking for: http://www.sealcocvp.com/prod/catalog/001500/index.htm