The obvious step beyond anchoring is implantation. Rather than relying upon anchoring a "belly" putter to some moveable piece of avoirdupois near one's solar plexus, why not implant a "docking station" (A) to the sternum, put a "male" complement (B) to that docking station on the end of every long putter, and when you get to the green attach B to A and Bob's your uncle! When finished, reverse the procedure (making sure, of course, to disinfect both A and B with rubbing (or even drinking) alcohol).
Rich
PS--(For reference, read (or re-read) Chapter 8 of "Catch-22" wherein Lt. (later to be LG) Scheisskopf explains his dream of surgically attaching soldiers' upper and lower arms by brass implants and thin wires to perfect their close order marching ability.)
jpp