Hi all, well it had been long enough I figured so I removed all the repair material. I'd been letting the hose clamps out a little periodically since the trunk appeared to be growing in diameter.
However, the repair never "took". The outer piece was a rather thin piece of bark and cambium and did not stay alive. I suppose the best course of action now it to let it dry/air out a bit and then coat it with some tree sealant?
Overall I don't think this looks too good. If I had just put the tree in the ground I'd probably replace it. Yet it did set a few fruit this year so I'll let it ride. It has been growing extremely fast- I've had to prune it pretty hard or else the extensive new growth is prone to additional breakage.
Additional comments/suggestions appreciated!