I have had a chattering from one of my pulleys for a few days and was finally able to track which one. The tensioner next to the crank is moving/wobbling a bit and seems to be chattering more and more each day. Anyone changed this one out yet? I know of #6 and #4 but is #9 the same pulley size? I will contact Rob @ Needswings but maybe he or someone else will see this and chime in. Thanks