I have a Glenn, a small tree, so it doesn't overgrow the yard. It WOULD be nice if it ever set fruit.
Next spring I'll have to graft on a dozen Bowen branches.
The ideal is to grow a Bowen from seed, graft on a Glenn, then graft on your choice of fruit. The Glenn in the middle is a girdle that limits the size of the tree. That's "double grafted".