you might find this discussion here about your arm interesting
https://forum.audiogon.com/discussions/eminent-technology-et-2-tonearm-owners
Parallel is for VTA, I would measure the height of the old and new cartridges before the switch, get a clue if/how much up/dn difference you will have if any (true height in play position with tracking weight applied, various suspensions move differently).
How is azimuth adjusted with that arm tube when you remove/re-install it? That can be very frustrating on some, it may be better to leave the tube attached, and simply change the cartridge, more difficult, but if prior tube rotation was difficultly achieved ..... I use a speck of tak to hold screws or nuts in place temporarily
sticky tack, just a speck needed to defy gravity
You need to verify correct azimuth, I use a 1/8" thick mirror, same thickness as an LP, view when lowered, look ar cantilever, any deviation from straight will be reflected in the opposite direction in the mirror. It is both easy and vital.
magnifying mirror with light to reflect/view bottom of cartridge