A pal brought me an old Kirk Currie putter head that was once, on a long/belly putter. It has a .344 diameter stem. Before I seen the head, I ordered a .370 tip “ski pole” shaft, and 2pc grip to re-assemble it. But, when I begin, I find this .370 tip is only .314 inside diameter, and of course, doesn’t fit. Because of the shape of the head, it cannot be turned down in a lathe. Any suggestions?