On Jan 25, 2011, at 8:54 PM, Richard Ucci wrote: > List, > Local music school with 3 p-22's , 2yrs old. Last tuned March 2010. 60 or more sluggish keys between the 3. > Reamed balance holes and lubed bushings . I can't recall if they have weights or not. > Keys are sticking again, but they did go thru a summer in nj. They keep putting me off about DC systems. > Any suggestion's? Richard, Per your request of any suggestions: I would forgo the concept of DC systems as a solution and concentrate more on what the actual problem is that is causing the keys to stick / be sluggish again. I would also forgo your approach of reaming any more balance rail holes as a solution. If in fact the key bushings are causing this problem, easing is a more practical and long term solution than lubricating. The lubricant you used could have created an additional problem in and of itself. By examining a few of the worst offenders on your next visit, you should easily be able to determine the actual cause for this issue. 60 or more is a huge amount and deserves special attention for the real problem, especially knowing the usual reliability of Yamaha pianos. Keith
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