I need to attempt to rebuild an early Trico vacuum wiper unit (RSX-1?) that has the valve mechanism cover retained by two small screws and the brass name plate. See the photo below. The paddle moves freely, no binding, but there seems to be a huge vacuum leak somewhere preventing the unit from operating properly. All the rebuild kits I have seen give instructions for the later units with the snap-on covers. The valve mechanisms are different. Does anyone know where I can find instructions for the early vacuum unit or at least photos of the early unit? The early valve mechanism is retained by what appears to be a pressed in rivet and must be removed in order to remove the paddle from the housing. I contacted Ficken's and he doesn't want to touch an early unit. It's a shame because the unit itself appears to be in superb condition. I already tried the ATF according to MAFCA instructions and that didn't work. Any help is appreciated.