Yes on “more to it” on alignment. I did find alignment on the main and seat tube visually.

As a “shadetree” mechanic I look for all the ways a problem can be solved with resources I have.

I solved a past fork alignment issue by removing the fork and doing measurement on my drafting table by blocking down the sides of the steerer tube to measure the dropouts.

That trick was used to align a thoroughly used and abused Raleigh Grand Prix. Thankfully all my other bikes were spot on or just needed wheels properly dished.

It would be grand to live near some of the frame experts on here (sigh).