Plum Tree Pollarded and new shoots

I have a plum tree in my orchard, that is growing on the wrong rootstock. As it is growing massively to tall. I cannot reach the top to harvest the small crop of scion wood or fruit. So something drastic had to happen. Well I decided to pollard it right down to approx 5ft or 1.5m tall.

I was going to do multiple crown grafts, but I have not got any replacement trees on smaller rootstocks of this plum variety. More importantly I had got to get some. Just below the main cuts on the trunk you can see small buds breaking. I should have some nice scion wood next winter and then re graft as well. Cut ends to be treated.