Thanks again Andreas.

Ok on to your question.

Yes you can swing the plane of focus with the rear standard, yes you alter the shape and geometric relationships in the composition, and yes for many subjects it doesn't matter.

Personally I try to think of scheimflug as a tool to control what's in focus, not necessarily a tool to get everything into focus.

Shifting requires that lens and film remain parallel, if your camera can do rise and fall, you could turn those movements into shift by tilting the camera 90 degrees. The lens and film don't care but that may not be practical.

By all means get out and practice.