Just bought a few 2117' s(wanting to try aluminum over wood), left them 31in long and put a 125gr head on them and am getting a noticeable fishtail flight. What can I do to correct. I followed the chart posted on bowjackson.com and it recommended 2117 or 2020 shafts. Would the 2020 shaft be better suited (47#@28" but I am 6' 4" and pull a few inches more, so I need the 31in shaft.)? Could it be possible that I am actually pulling a few more pounds and need a stiffer shaft? Do I need to increase/decrease my point weight? Am I just overthinking this? Help!