Hi, sure mate....
this is how it went in the terracotta tub, some of the surface roots were teased out by hand and roothook
20180304_125429 by
Bobby Lane, on Flickr
after one year
20181227_123103 by
Bobby Lane, on Flickr
i felt it could go into a good sized bonsai pot
so reduced it back with a saw and chopped back heavier roots with secatuers
its still a compact rootpad of nursery soil, this would have drove some crazy into barerooting and getting into bonsai soil, but its fine, the tree is healthy, water drains though in a matter of seconds, i just water accordingly
20181227_131925 by
Bobby Lane, on Flickr
20181227_132045 by
Bobby Lane, on Flickr
no sealing of wounds nothing
20181227_131953 by
Bobby Lane, on Flickr
the root pad was planted onto a bed of fresh bonsai soil then more fresh soil in around the edges and top
maybe in a year or two, or three, i can go in and reduce a little more of the nursery root pad
the root work was done in dec and left on my balcony, this tree was the first to get going and is far ahead of my other hornbeams. carpinus b in another thread was also re potted over winter.
this might not be optimal timing, but these trees didnt seem to mind.