rotarius
If you need to square up a cart in a headshell why would you not use the precision of digital calipers to measure distance of each side of a cart to the headshell edge? I am an engineer, I like to confirm with actual measurements rather than eyeing something!If you use calipers to "square up a cart in a headshell" then you are aligning the cartridge. If you use a proper mirrored alignment gauge, you align the actual cantilever. Given that many phono cartridges have cantilevers that are misaligned - however slightly - the mirrored gauge produces a better result. And yes, you can confirm that superiority using measurements.