Bought one of the prototype Futura putters back in the day. Loved it, and still do, but, during the fat grip revolution I put on a Winn 1.18 grip. Gone thru several other putters over time but always came back to the Futura. But with the oversize grip if feels real light. The horseshoe weight on the back is etched at 35. Are there any, and could I replace it with a heavier weight?, and if so, would that throw off the front/rear weight ratio? I do have the 2 milled weights installed on the rear of the face.