Well the signal conditioner was returned from Aero-Mach with apparently several items repaired that were "not per factory specs." The bill from Aero-Mach was $470 plus some shipping charges which seemed reasonable compared to any other options. My shop installed the unit last Friday ($140 to them) and calibrated the unit with the fuel gages. I got in the airplane yesterday (Saturday) and after visually inspecting the fuel tanks and seeing they were full, I turned on the master switch to see the fuel gages indicating EMPTY!!!
( %^&*(#@!$%^&%^$
After engine starts the gages came to life although occasionally still wiggling back and forth until reaching cruise at which they worked fine and indicated correctly as fuel was being used. I suppose something is loose somewhere so we will dig some more and I will share the info as it becomes available.