<html> Dave, The plastic has nothing to do with the difference in your experiences, Dave.  The root cause for the sluggishness will explain what you have found.  Most likely, the wood parts you have dealt with have had poor quality bushings that were never fit well, so some lubrication will get you out of trouble.  The Kawai actions will have high quality bushing cloth that were originally fit properly, but there is something else wrong causing the centers to tighten up.  Humidity alone should not do this, unless they are literally soaked with water. You should not put lubricants on these parts - it generally does more damage than good, and does not really address the problem.  If the part is tight, it should be repinned for proper fit. If you think the piano is in warranty, you should call one of us at the Kawai office with the serial number to check.  Again, a little draftiness and dampness will not cause action parts to go this tight - there is something else going on, and by trying to use a quick fix you are not diagnosing it.  Do not lubricate it while the warranty is in effect, as this could very likely make you responsible for the action warranty from there on! Kawai action centers very become overly tight from humidity - if anything, they tend to be a little on the loose side in dry climates.  Well fit cloth bushings and polished center pins do not need any lubrication to work properly.  When you run into this, take an offending part out, take the pin out, burnish and install a new pin. It will be permanently fixed. Don Mannino RPT Kawai America dmannino@kawaius.com (800) 421-2177 At 11:11 AM 2/8/2003 -0500, you wrote: <blockquote type=cite class=cite cite>In a message dated 2/8/03 6:31:27 AM Pacific Standard Time, tune4@earthlink.net writes: <blockquote type=cite class=cite cite>Don't the centerpins run through bushing cloth just like any other action?  I don't understand why the plastic has anything to do with the sluggishness of the centers.  Maybe reaming for a little more clearance might be a better solution.  Lubrication may not be the answer to overly tight fitting pins. Paul Chick </blockquote> Yes, they do run through cloth.  And I'm as baffled as anyone as to why lubrication doesn't seem to work on plastic when it has worked practically every time with wood centers.  It's happened on numerous occasions with plastic, not just once or twice.   In most situations I've seen, with wood, you can take a very tight center, use CLP or some other such lube, and the center is virtually free, if only temporarily.  Almost every plastic part I've seen that has been even slightly tight has been virtually unaffected by the introduction of lubricants.   I am not making a judgement here, just offering what I've experienced to the list, thinking that maybe somebody knows something that I don't(well, that's a given...:-). Dave </blockquote></html>