I have this about put to bed as far as I am concerned.
I have all buttons of relevance mapped and functioning the way I'd expect them to, plus a few mapped to mach4 inputs for some future lua fun.
I have the MPG wheel working for both a step mode and a velocity mode.
and I have the display updating with all the correct data.
as eluded to above, the windows 10 driver signature issue still exists and will not be addressed (they want $500 for a signature certificate...
) but there is a workaround I have tested and documented. and there is a Microsoft library package that has to be installed for the plugin to work.
Other than that, I've got a working solution for anyone interested. PM me and I'll dropbox you the files needed to get this pendant working under Mach4.