No problem, Ralf. I have only rather crude sketches of the circuit that I reverse engineered. Intended to get the schetches into a decent schematic capture program. Had one board finished then lost access to the program. I've owed Mr. Teitelbaum these drawings for a long time (he was and remains both very patient and a big help in figuring out intricate details of this stuff, and provided a number of pieces that were dissected for hidden secrets). So eventually these diagrams can be generally available as the final pieces of the puzzle. Several folks have expressed interest in making a modern replacement, especially in anticipation of more horsepower from DMC Houston. Haven' t talked to Bob Zilla yet...may not be enough autotrans owners in distress out there to make one financially viable. Would be fun, though... file://mark