Check this out. This is so cool!!! I have replaced the face cam with a more conventionally shaped cam, and added a really strange rocker arm. I love it when the real parts operate just like my cad program said they would. There was nothing wrong with the face cam I had on the engine originally, but there were problems involving consistent latching of the exhaust valve lockout mechanism from the governor. In order to change this (and hopefully improve it), I had to change the style of cam I was using.