With a 1Xanything setup? I don't understand.

How can there be more than ONE "proper" chainline with anything other than a single(ok....fixed)speed, 1X1, set up. As soon as the chain is moved from one cog to another it would seem to me that one combo has to be less than "proper". Am I right.................there may not be the first problem with the cog/chainring relationship but only one pair can be perfect or "proper".

Cheryl has a 1X8 setup and I have the rear derailleur set to run on cogs 2 thru 5, big to small size, (1X4 in reality) and it is working super. Of course, she doesn't fly on flats or climb any mountains. The respiratory therapist is suppose to be by this week to set her up with a portable oxygen setup---that might change the whole game-plan!!!!

At some point it would seem that it moves from "what will work" to "what do you need or use".