Also going to do this.  Waiting for the dual balance grip to arrive as we speak.  The counterbalanced futura x putter head is 50 grams heavier in the 35" model i believe.  They use a 50 gram weight in the grip end of the club.  Ive been counter balancing my SC putters for a couple years and the company i work for actually makes the weights that "Heavy Putter" uses to back-weight their putters/clubs... So i have a couple weights laying around that ill use. I ordered some heavier putter weights for the head and hopefully i should gain the same effect as the actual dual balanced version. Just extend your putter shaft by 3" and glue the weight in. Hardest part for me was finding the SC/winn dual balance grip hah but good luck!