Like many here, if the capsule is loose I just pull it off. Otherwise with a waiter’s corkscrew I usually cut below - as Chaad says above, it is more stable if cutting while holding the bottle.
I think this all depends on what you do for a living:
- If you are ITB/Sommelier/Wine Director, or work on premise, you have to cut under.
- If you don’t work in the business, you can do whatever you like.
- If you are ITB but work off premise, you can do whatever you like, unless you want to be a Sommelier, then you have to cut under.
And if you’re a mohel?
Bob,
In that case taking less is better because you can always take more…hard to put extra back if you take too much.