Armidillo. Any reputable pro shop will have one. If they ask you what is your pap, but do not know how to locate it, you are probably in the wrong shop.
AMF sales a disc with their armidillo that tells you how to use it, although it is not that complicated. Basically you take a plastic ball (some will argue what ball to use), roll it with your regular release through the oil on the lane so that it will leave an oil track, line up the armidillo with the first track and it will mark your pap.
Based on my experiments, me changing my release does not change my pap significantly. What I have found is that my pap changes more depending on the ball and the layout on the ball. Again, my personal experience.
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Those that can do. Those that can't complain. Pimpin ain't easy, but it's mandatory.
Most things we like, we don't need. Most things we need, we don't like. Don't confuse your likes with your needs.