I'm still pondering an Si3 with a plumber's neck RST hostel. Swung one a few times on the indoor practice/demo putting area at my LGS a couple weeks back. Felt good and worked well. Should probably get a SAM fitting before buying any more putters, though
I'm working with Brandon at SeeMore to get a black version of the MFGP2 mallet and I'm super excited about it. I'm no stranger to using a SeeMore but this will be the first face balanced at impact model I've used and I'm really curious to see if it makes an impact this season.
I'm also thinking about either taking my Si3 or buying a cheap SeeMore to cut down for my 10 year old daughter to use. I think getting her using the RST system would be a boost to improving her skills on the green.