<HTML>Howdy folks, I got a call to tune a Yamaha MX80 with Disklavier that plays continuous= ly in a Chinese restaurant.  I tuned it last year, and it had no real p= roblems to speak of.  When I walked in, my contact told me that it "mak= es a real funny noise, like it's hitting on wood."  I tuned it(it was a= t pitch, and in remarkably good tune all things considered), and noticed alo= t of bubbling hammers.  Keydip was shy almost 2 mm from the factory spe= c of 10 mm. I am not that familiar with the workings of these players.  In a st= andard piano, I'd either shim the balance rail or take out paper or cardboar= d punchings from the front rail to increase aftertouch.  What stopped m= e from doing that was the square metal tab that protrudes from the bottom of= the key and slips into a sensor slot on the keybed.  I have no desire = to alter the depth of travel and possibly alter the elecronic end of the ins= trument.  Does anyone have experience with this problem with these inst= ruments? I never did find the woody sound while tuning the piano, but as soon as = I turned on the player mechanism, there it was, a really loud, obnoxious cla= ck everytime F4 was played.  It didn't take long to figure out that it = was the solenoid knocking against the metal that covers all of the solenoids= .  I pulled up on it manually, and it was noisy; it was the only soleno= id that made the noise.  I'm assuming that a grommet or rubber washer o= f some sort is missing, but I did not have time to take out all of the keys,= remove the cover, and find out what was amiss.  Nor did I have whateve= r part I might have needed. I noticed how much the keys were lifted above the balance rail by the so= lenoids, so I did a quick fix and lowered the adjustable metal key-stop rail= to limit the travel to the point where the solenoid would not max out. &nbs= p;I know this is probably a short term solution.  I would certainly app= reciate any advice, information, and general wisdom about either or both of = these problems. I have not called Yamaha yet, but are they likely to be forthcoming with= a tech manual on this, or is there one online somewhere that someone could = direct me towards? Thanks in advance, Dave Stahl</HTML>