I took a break from practicing for about two weeks and when I came back today - my tuning was all off!
If I turned the pitch knob all the way counterclockwise -- to say 7 o'clock -- my pitch field was still only about 14" deep!! Previously my normal playing position was with the pitch knob pointing to about 10 o'clock.
I was dreading having to twiddle with the dreaded L5 and L6 - especially because my L5 was stuck last time I tried to turn it.
However, I was able to get a good pitch field by pushing down on the heavy wire from the circuit board to the pitch antenna connector ... maybe 5mm. Now my pitch knob is almost at 12 o'clock when I'm in my normal playing position.
I don't think I put on *that* much weight at Christmas, and as far as I know the unit hasn't been jarred - does anyone know why it would have gone "out of tune" in just a couple weeks?
