<html> <body> Dave, Some YC grands from around 1993-4 had a stepped zinc insert that was extremely sticky.  These were only in production for less than a year because they were horrible to tune even when brand new. The brass rods I did not find difficult to tune at all - brass and steel together are normally self lubricating.  The tone was a little zingy with those, though. There is no answer for the zink inserts.  Protec helps, but needs to be carefully applied from below, right at the contact point. Don Mannino At 06:05 PM 3/9/2007, you wrote: <blockquote type=cite class=cite cite=""> Hello all-   I mentioned a couple of weeks ago that I was going out of my area to service a Young Chang G-150 due to the fact that no one in the area could tell her why it would go out of tune within days of service.   First of all, I didn't like the room it was in. Kind of a four seasons porch with glass making up three walls. Aside from this, after close inspection, tuning went fine until I ran out of agraffes. At the capo bar there seemed to be so much friction that you could not settle the string where you wanted it. I would move the string up and down and it would make a loud snap every time it would finally break the friction and change pitch. I tried a little ProTech with no results.   Of course I have seen pianos that did this but none that were anywhere close to this bad. It was untunable, and what improvements I was able to make were gone in a few days due to the unequal tension in the strings. Has anyone else seen this in the G-150s and found a cure? The only thing I can think of trying is to replace the duplex type bridge next to the tuning pins with some thick understring felt. At least that would reduce the angle of the string going under the capo.   Any suggestions welcome.   Dave Bunch</blockquote></body> </html>