My Weber Yellowstone came with Grovers 309's and other than the A tuners they worked fine. My problem was one of the A tuners was really stiff and the other kept going out of tune (flat). I used tri-flow and the sticky one never loosen up. I had Bruce Weber look at them (the mandolin was 4 years old at this point) and he couldn't make the stiff one loosen up. I bought a set of Rubners two years ago and they work smoothly and stay in tune. I have set of Rubners for the two point Bruce is building for me. At a third of the cost of Waverley's makes them feel even better.
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