RE: Range fineder 4 the bow??????
They used to make a laser rangefinder that attaches to the bow, I haven't seen one in a while though. I wouldn't want one on bow. I will do a search and see if I can find it. I think it was made by bushnell?
As far as the Eotech range finder you can do that with pins if you want. It is just a type of reference ranging. You can do it with the reticle of your scope as well if you a duplex reticle.
I do what the others do. When I set my stand I use my range finder to range a perimeter around my stand taking note of certain objects. When a deer walks in that circle I don't have to think about anything but aiming and releasing an arrow.
Paul