Sometime early next year, the new tailpieces are supposed to hit the market in the States through DBG that are slotted at 4mm instead of 3.5mm, if I'm not mistaken, and will fit most non-tapered strings above .105's and up to .130's. The only other option is to CAREFULLY file out the slot with a rat-tail file to NO MORE than 4mm. I've done this on one of my tailpieces that now sees regular duty on whichever 5'er that I want to play with large strings. As soon as the new ones are out, I have a standing order with DBG for three of them. Contact your dealer and let them know what's going on and to keep on top of it. I think the retail price is somewhere around $51.80 USD if I remember correctly. Hope it helps, ~M~