rockm

I doubt you did any great damage. We've got some growing season left.

It seems you are looking at the trunks as the reason for digging them. That's a big step in collecting. Most people take in the whole image of the tree they're digging as the reason for digging it. They tend to look for "natural bonsai." Mostly that's impossible. "Natural" bonsai are quite rare. What they should look for in good collectible material is the bottom third of the trunk. That is most important part of the collected tree. The rest can be, and probably should be, replaced over the years.

I would let the trees alone next season. Let them go--feed them heavily. No pruning. See what sprouts where and see what's going to die back. Once established, the following season, prune off all the old branches. See where new sprouts emege. Decide which are best positioned. Work from there.