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We did a lot of that last year and after some trial and error came up with something that seems to work well. We used 1/8" cable with a small screw tensioner in the middle and plastic tubing to protect the tree. That way you can pull the cable tight by hand, clamp it and then crank it down with the tensioner. You need to locktite the screw so it doesn't wiggle loose over time. Seemed to work well with the 4-7" trees we were planted. The only ones that had any issues with leaning were the ones we didn't do very well (the trial and error period).
I know everyone has their methods for this and I'm sure someone has a better idea but that has worked well for us. A really good arborist I work with says that big trees should be tied at 2/3 the height of the tree for 1-2 years. I've also seen 4" trees staked with 6-8 foot 2x2's and ArborTie that seem to do fine.
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