I wrote to MMD a while back concerning a Steinway Grand piano with
Welte reproducing system.  My client is trying to market this piano.

The original open-cup mercury switch is non-functional at this time. I
would like advice as to a more modern, safer switch that I could
install in its place.  What type would work best, given shut-off
bellows and the like?  I have photos I could email to anyone who can
advise me here.

Herbert Lindahl
South Windsor, CT 
860-644-9407 (office)
860-922-6739 ( cell )
www.herblindahlpianotuning.com