@rlloyd 75g was too much for me in anything but a Tank but putting and feel is different for everybody so all you can do is try. The weights can be bought separately so yes you can buy all three sizes and try them all. That's what I did. I have tried a Flatso grip and I personally did not like it. I've tried just about all the SuperStroke grips at one time or another and have spent a small fortune on doing so but to me it's worth the experimental cost to find the right grip. Until they released the Pistol series I hadn't found anything I was totally content with. Once they released it I bought all 3 sizes and trialed them all. I found the Pistol GT 1.0 worked best for me out of all the grips I ever tried. I then bought a large number of them and regripped all of my putters. I'll bet I hold the record for the most grips purchased by a single individual.
Also, just holding a grip in the store does nothing for me. A grip feels completely different once installed on a putter and you can actually feel the weight and balance. The only way I've found to know how a grip will feel and perform is to buy it, install it, and see how it feels. Expensive, yes but worth it in the end (in my opinion).
@PC98 I agree, holding a short stick in the store doesn't really help. I tried my friends flatso and liked it. Otherwise I probably wouldn't have even thought of using it.
If Callaway was smart they would have their demo putters with a screw on putter grip so you can try them for real in the shops. Like switching out shafts and heads.
@NaydelmanCG Can I get credit for that brilliant idea