OK. gotcha. Personally, I would cut that one way back to where it is more straight. If there is no nurse branch, so be it. Id also wait til you are going to graft, and make a fresh cut then. You got that one tree out to the right, was that the culprit that made the one you are grafting lean? That tree was leaning for a reason, did you open it up over to the right more than just that one?
I wish I had time to give you a hand, but I'm swamped right now. My buds are really swelling right now and a couple varieties are at silver tip. I got my sprayer hooked up, nozzles cleaned, calibrated it, and ran a test spray with water yesterday. Got to spray a dormant oil this week. We'll have to get together some time. My son lives over in Lebanon, so I do get over there every so often.
Good luck!