[Electronic M]

Efficiency is not width (and should be adjusted for min cathode current if you value your flyback).

I'm not familiar with RCAs after the CTC-20 (except the 25 and some early XL-100s) but many color sets of that time did not have a width control or only had a 2 position jumper wire for normal/increase width.

Back when these sets were new no consumer would complain about overscan (there was no letterboxing or graphics to highlight the effect), these sets had no B+ regulation so if you didn't have enough overscan and line voltage sagged you would get underscan (that would result in a service call), and the output tubes from new to weak enough to merit replacement would change emission enough to cause a substantial reduction in width.

My Zenith 12B13C52 that only has the jumper I've learned to not worry about anything but underscan, non-circular circles (vertical, not overscanned enough to match horizontal), and centering/linearity issues.

By alignment do you mean you adjusted the IF and tuner with a sweep generator? If not your terminology is against decades of convention...Traditionally alignment is only for RF/IF circuits, NOT adjustment of sweep/convergence systems...That is called Setup Proceedure.