Hi Michael,

Thanks again for your attentive and thoughtful replies to my questions.

This has possibly already been requested-

The option to lock and inverse lock objects would be helpful
when you have a lot of objects and you want to develop
a specific part, without having the other stuff get in the way,
while having the rest of the model as a visual and operational reference.
( object snaps would still work on the locked objects)

The image is of Rhino doing it's best MoI impersonation :-)
The grayed out curves are locked, the blue curve is "live".

-Jesse