Thanks for your quick response, your explanation is a lot better than what is available on the site.

It kind of cracks me up. Seems that Futaba would save themselves all kinds of problems by making these modules different physically, so there was no mistaking which module went to what. And it would end the Spectra module issue as well. How in the world did their module just happen to be the same size as Futaba's?

Thanks again

Dan