In Rhino forum one guy posted script for mating: https://discourse.mcneel.com/t/how-to-align-two-objects/121132/32 You can see also how it works in video here.
It`s quite short and simple script. Your method is wonderful I`m only sharing it because it`s in same topic as we talked previously. Maybe it will help somebody to write similar script for MoI (if it will be needed of course).

Cheers!!!