Some of my harp friends and I have been wondering why pedal harps do not traditionally have disc mechanisms on all the strings. It would seem like a great advantage to harpists to have this control over ALL the strings of the harp. My Lyon & Healy 85 GP has only one string at the bottom and one string at the top without mechanisms, but I would love to have the discs on those two strings! It would save having to retune the Low D to D flat when I need that note, and also the Top E when I need E flat! Does anyone have ideas on this subject?