Ketoi,
Nice pots. I like your work.
I did have a couple of suggestions on the larger pot-- the big unfired one that's pictured just a few posts back--
The width is great, but it is very, very narrow. It should be about two inches deeper front-to-back, maybe more, to fill it out proportionally. This is not only an artistic thing-- such a narrow pot can look unstable--but it is also a horticultural thing. To fit a tree into a pot like that, you would have to trim off front and back roots more aggressively than side roots--that may lead to some slow down in growth in front and back depending on how much has to be removed to make the tree fit. For some collected trees with large roots in front and back, it could take some time to reduce the root mass enough to get it into a pot like that.
Lastly, drain holes in large pots should be located evenly, not just in the center. Drain holes should also be placed at the edges of the interior. They should also be larger in diameter for such a large pot. Small holes in more or less the center of such a large space can limit drainage at the sides. This can wind up killing roots if water is left standing around the edges with nowhere to go. Good drainage becomes more important horticulturally with larger pots, as there is more surface for water to stand on, more room for dips and uneven spaces to trap water, and more water to deal with.