G3 ION Binding Mount Template
Here is a preliminary G3 ION Template. It needs confirmation by others. I'm not clear yet as to how best to measure the heel adjustment area which may influence how one might need to put the heel in a different location relative to BSC and toe. Be sure to measure the horizontal length of your Boot Sole and not to assume that the stamp on a boot is accurate. I found a 5mm discrepancy on mine.
Another possible variable is the distance from toe of boot to pin line.
http://www.slidewright.com/Bindings/G3_ION_Template.jpg