I have in the 4th leaf:
Enterprise G41
Ashmead’s Kernel G11
Roxbury Russet G11
Height= 10-12 feet
Width= about 6 feet approx.
Cone shaped canopy, Christmas tree shaped
Training- similar to vertical axis or slender spindle except no permanent scaffolds on the bottom whorl at least so far
I have eight trees I grafted myself on Bud 9. The trees spend two years in the vegetable garden and then this Spring transplanted them to tall spindle planting with a three feet spacing.
I have some additional trees on G41 that I purchased this year.
All of my trees are supported by an eight foot t-stake driven a foot and a half into the ground. Each tree is tied to the stake at 3 or 4 places.
Do you have some specific questions?