This ash is very well established, probably 7 years in this pot or even longer. It has enormous character and feels very old. I am happy to add this to my collection.l The pot by Lubos Skoda will look good I think. It will be necessary to cut off about 50 % of the root ball. A well established ash can take this, no problem. Good ashes are extremely rare. Actually I don't know of any good one so far. Can't wait for April next year.
Walter Pall's main blog about bonsai and his work with trees from day to day. Lots of good pictures of good trees and lots of valuable information about bonsai.