Bend Tech Pick points question.

Yesterday I purchased Bend Tech and am going to start working on a cage and rear bumper for my 2010 800 50 inch later I Wil make a front bumper for it but I want to make a 6 point cage that comes back to the bumper. I have seen someone post a way to take the pick points for the mount points of the cage my question is can anybody explain thare way of doing it? My plan is to take a laser on a fixed point and start using that to measure from it will be like the tri star in bend tech. Or does it need to be like a rail the runs the length of the rzr that a lzr can sit on and you would take numbers from that point somehow making that rail square to the rzr. But square to what because the cage is all you would really be worried about right? Sorry for all the questions and I don’t expect this to happen over night I’m just trying to get a direction.