It's been about two weeks of me trying a few large diameter grips to compare to my regular grip (SNSR 140CC 125 gram).
The WINN 1.6 I've liked for short putting but found that the extremely large diameter harms my sense of touch-feel when lag putting.So, the WINN 1.6 is out.
The WINN 1.32 is a better size for me and I will continue practicing with that grip.
Two other grips I am trying are the Garsen Pro and Garsen Max . These two have a distinctive shape which essentially requires that the player conform to a particular grip technique (which in turn causes the elbows and arms to set in close-to-the-body and thereby promote a shoulder powered stroke. The Garsen Pro is not a large grip, but (to get a sense of Garsen's concept) I deicded to try the Pro along with the larger Max model.
All the grips I am trying are 50 to 75 grams lighter than my regular SNSR 125 gram grip. I do like the way using a lighter weight grip does improve my ability to sense the weight of the putter head. Also, the lighter grip weight makes for a lighter dead weight putter, which has helped my lag putting.
For short putting I do believe the heavy weight of the SNSR 125 gram , including overall heavy dead weight of the putter, promotes stability to the putting stroke.