I have modified a lot of my do-it molds with a dremel. It takes a steady hand and only take a little at a time(easy to take out metal but hard to puy iy back). Lay your wire in the position you want and take a sharp tool and mark the mold. Work the mold until you have 1/2 of the wire on one side. Dip the wire in paint, lay it back in the groove, close the mold and you will have the exact alignment for the other side. Work that side untill mold closes and you are finished. Hope this helps.
Kelley