Could it be because that's where the strings end? You have an abrupt loss of downward force on the bridge/soundboard, plus (if I understand what the Rons and Del are saying), those strings tend to have less tension due to poor scale design. I think Ron N was saying some days ago that his redesigns are not nearly as susceptible to pitch change as the original scale was. The strings adjacent the plate struts are more prone to change during tuning. Gotta be something to do with the lack of tension on those portions of the bridge at the ends of a section of strings. JF <div>On 3/10/07, RicB <<a href="mailto:ricb@pianostemmer.no">ricb@pianostemmer.no</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> What this does not explain tho... is why pitch change happens so unevenly across the scale as a whole.  Why do the lowest notes in the middle sections seem to have the largest reaction to pitch change, why does this pattern more or less reverse itself in the highest section, and why does the bass seem much less affected as a whole, but the highest notes are the ones most affected there ? I keep getting pointed back to something about the two planes (string and bridge surface) changing as a whole in relation to each other. Cheers RicB     For me it seems to be the string with the shortest length from the     capo bar     to the tuning pin. That string tends to be sharp, while the opposite one     tends to be a tiny bit flat for me..     les bartlett </blockquote></div>