Lol...while you done good, the most likely outcome is you will not have hundreds of tubers, but rather, a few large healthy ones. You can cut the dead foliage off for cosmetic reason, but there is nothing in nature that mimics this, so I never bother. The tubers are winter hardy, that meaning they survive cold temps but not a hard freeze, so you can leave them in situ, if the tubers are deeper than yotu freeze line. My friend Perry Slocum grew them in outdoor ponds in Franklin, NC, with obviously good results, while he wintered up the road from me in Fl. < g > Barring that....bring the pots into a garage, cellar or any area that won't be subjected to a prolonged hard freeze. Nelumbo naturally ranges into Canada, so overly drastic measures are not required to overwinter them. Having said that...leave sleeping lotus lie. You do not want to divide them until late winter/early spring....once the danger of a freeze is past, but before they begin to 'run'.
Truth is not what you want it to be; it is what it is. And you must bend to its power or live a lie.”― Miyamoto Musashi
"Knowledge speaks, but wisdom listens." ~ Jimi Hendrix
“The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.”― Stephen Hawking
Craig