For future reference, would be better to cut in early winter when the tree is all the way to sleep. Not sure how much winter you have left in zone 7, but it’s almost spring here in 9. I think you can still prune and be safe. That being said:
I would chop now, and then wait to repot and work on roots until after the buds/leaves are starting to open. You should be safe on these youngins
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