Rick,
h ave a couple trees planted on Antonovka and they are very slow growers. That's probably my misforture.
I have learned since to pick vigorous growers for my poor (sandy) soil, like Grimes Golden
(which I think is the only apple tree we have in common. I like the Grimes Golden, and I guess I already know why you picked it. ;-)
I haver a youtube video of my brother and I pruning the top out of the GG with his Husqvarna saw. That tree has long, weak wood and
the whole top of the tree (normally standing at 25') would bend over to almost to the ground. I would stake the tree up every year because
I thought it would bust in half. Ugly, rough apple but it tastes great. Hard as a rock until almost ripe, but juicy and sweet and the birds
prefer red apples.
I'm looking forward to Spring. Did you plant those grafts in your yard?