I was wondering if you guys feel that an arrow scale, and spin tester for arrows is necessary? I just started bowhunting last year, and basically went with the arrows the pro shop recommended. They fly well. and I shoot well, but I feel lost when seeing all of the technical posts about arrow weight, FOC, KE, and how I can adjust my setup to get maximum power. I would love suggestions on whether I should get a scale and spin tester, and what brands I should get.