It shouldn't be much of a problem on 9. Just remove branches more than half the diameter of the trunk at the point they are attached and leave the tree alone. Keep it vigorous with water and mulch and protect from rodents in winter. Supplementary N may be helpful.

It takes several years to come into regular bearing, so be patient; it is very reliable after that.

I had the impression that even on a dwarfing rootstock it could get out of hand if not pruned severely.

Not on that rootstock! Just remove oversized limbs. I've never heard of any variety getting out of hand on 9.

I doubt it will take more than 3 years to fruit. If it seems to be excessively shading itself you can always thin the branches before it starts fruiting- just don't head anything back.

On much more vigorous rootstocks I believe in always thinning Fuji before it starts fruiting, but from 26 down this shouldn't be necessary.

OK, thanks. Good to know.