Hi Folks,  This is posted for a non-subscriber in Northern
California.  Please respond directly to <joeldr@gte.net.geentroep>
[delete ".geentroep" to reply]

  "Need a Duo-Art technician in Northern California to repair
   Duo-Art stack".

I suspect that this gentleman needs a complete overhaul as stacks
seem to go bad along with everything else.  An onsite inspection
may be necessary to assess all the problems.  After rebuilding 20
reproducers, if the stack is bad, everything else needs attention
also.

Thanks,

Rick Cooley