You want to use a *very* light touch, moving the bird gently into the fingers and keeping the bird moving. It will speed things up , but you want to try to get yourself at the right height for you as I found it quite hard on my back and shoulders. That said, I had helpers who were doing the other parts of the job, so I was *only* manning the plucker and not getting breaks.
It is a drum style plucker where you have to hold the bird.
I absolutely agree, Mike. We're just warning you it won't be magic. If I had to choose between hand plucking 12 birds or using the loaner, I'd take the loaner. You may find that some parts are better dealt with by hand, but that plucker should get most of the job done. I too would try to get it done in a day - the set up and clean up take a bunch of time. I'm just "gently" suggesting that you don't get so wedded to that plan, that if things are going badly, you don't change the plan *before* you cut/hurt some important part of yourself due to frustration or fatigue.
I'm pretty sure that I'd rather deal with the labor of using this plucker vs the struggle of hand plucking. Of course, I say that now.