RWS, you sound like you are a good golfer. Yes I have seen the new Callaway Sabertooth, it looks to be a good putter. I can never get use to anything other than an offset putter such as an Anser 2 lookalike or a B60 and its close replica's. Something about a mallet style putter does not fit my style on the greens, I also change putters quite often, makes me feel like I will sink more putts although that is all just in my head. LOL.
