We're working on a tap signal interface module to easily make generic open/closed tap up/down switches compatible with the T42 and T43 TCMs. Being that the T42 and T43 are used with Gen IV (58x) systems only, this will be part of the EFI Connection 58x lineup.
Here's a test (8mb video):
http://www.eficonnection.com/eficonn...erfacetest.wmv
5/3/2011 EDIT...here is the completed module. EFI# 110-00025.