bass height

So when I was young someone didn't see the parked car I was in and they rearended us, leading to a shoulder injury I have to live with. Thanks to my right shoulder being busted I could no longer play sitting down so it was standing only from that point on with the bass slung low. Tbf a stool...

What are y'all going by when you adjust your EUB's height? I have an NXT4 an was thinking about marking the stand just to be consistent. I notice my nose is right at F#, where I'm used to playing. Do any of you use a reference point, or just kind of guess at it and get it where it's...