Michael,
Welcome. I top to 1/2" from the stopper but other than that I would
agree with everyone else. 2" would make me nervous on a finished and
outgassed wine for long term aging. Kit wines bottled in a month would
not be an issue, but most suggest longer bulk aging.

Joe

1. When topping off, how close should the must be to the stopper? 1
inch, 2 inches?