clearance
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The only advantage on a technical rigging job is that with a bucket you can move your redirect blocks around with so much more ease.
Or you can just cut the branches smaller, move the boom and throw them down beside the chipper. Or you can cut blocks, move the boom and throw them down in a good spot. Or you can hang the top and then cut and throw the branches while using the boom. You can also rig logs that would be retarded if you were in the same tree, you can do lots with a boom. Two men who can both climb and run the boom can produce like crazy on a hazard tree job, been there many times.