Hello, just new here and this is my first post!
Did you end up using the root bags?
I planted a Shima Nishiki in a five gallon root bag about a month ago (it looks like a first year graft- with a big nurse root, one main stem and several tight shoots coming from the one stem at time of purchase).
It's definitely doing ok even in dappled shade, with the leaves unfurling nicely. I am planning on leaving it in this pot for another year plus.
I am using the same root bags for baby fig trees. I have been pretty happy with these bags so far.