The brake pumps will always provide pressure even with worn pushrods(not pins). They may get noisey, but still do their job. Understand one fundamental thing. RR and the aerospace division are engineering companies and if you feel you have the time, resources and engineering know to out-engineer, please proceed with your idea. I can tell you that all of the attempts I have seen in the last 30 yrs were a disaster from a safety and engineering aspect. The projects are abandoned in due time. Those that are successful, suffer from non-originality and do not sell anywhere near a non-molested car..