Greetings,  Robbie's comment [in 050207 MMDigest, Duo-Art Operating
Pressure] suggests that I have a problem with heating of the power
supply or the magnet valves in my E-Roll Player system.  The opposite
is true.  I said that it is difficult to design a system that does
not overheat, not that I haven't done it.  I can play against Duo-Art
pressures indefinitely, without a fan or even much free air moving
over the valves and they never overheat.

Best regards,
Spencer Chase
Laytonville, Calif.
http://www.spencerserolls.com/