Hi mdesign,

re:
> What about only position/align parts with face-face way with given offset value:

Do you mean as a transform tool or as a constraint in a constraint solving system like in the vid you linked?

You can do it as a transform tool currently using the Transform > Orient command. To get your offset value, before you pick the base point type in r0,0,offset (like r0,0,5 for offset of 5) and that will alter the base point to be at +5 along the base face's surface normal.

Here's an example orienting 2 parts by face-face picks with offset value of 25:



- Michael