As others have said, it really depends on your lifting job: how high do you need to lift it, do you need to then drop it all the way to the ground, etc. I've learned to have two different toplinks handy when I'm using the boom pole. Also, sometimes you need a place to place your load temporarily while you readjust the toplink. Example: I had to pick up a large load off the ground and put it up on my flatbed truck. With the toplink adjusted long enough to attach the chains to the load on the ground, I could not pick it up high enough to get it on the truck. My solution was to set up a pair of sturdy sawhorses next to the truck. I set the load down on the sawhorses to take the strain off the chains. Then I shortened the top link as short as it would go. Then I was able to lift it up on the truck. For doing the opposite you may run into the same problem. If you have the toplink short enough to pick a load up off a truck or trailer, you may not have enough travel to get it all the way to the ground. Having a midway place to set the load while you readjust is good planning. These are all things you learn by trial and error...unless you ask here first! btw, this is one really good reason a hydraulic toplink would be super handy! Someday, maybe...
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