Agreed - learn the plane, learn how it likes to be set, done. And I am a plane pig, but I recognize there is much more value in using a few planes that are very capable than a whole bunch of specialized planes.
The subtle differences in how all of the planes like to be set is something that doesn't even require conscious thought - just some repetition. Just as setting the cap iron in the first place, it's better done by experience and experimentation than it is by trying to create an apparatus or shim or some other such thing to set the iron.