SuperStroke Slim Grip on a Blade putter (Cleveland Bronze)?

That grip weights 130g, compared to the average stock grip that would weight somewhere around 60g.  So you have more than doubled the butt-end weight of the club, which will have a huge affect on the club's swing weight making the head feel very light.  You could always try adding weight to the head (at least temporarily) to see if the feel comes back.

FWIW, I added a Tiger Shark Ultratac jumbo grip to my Odyssey Rossie putter and the overall feel of the putter changed dramatically for the better.  It's considered a blade putter, but it sure looks like a mallet to me.  It has a fairly heavy head, and I never had good control of this putter.  It felt like I was swinging a long thin pencil.  The grip helped give me a lot of control, and I feel it definitely helps to keep my left wrist flat at all times during the stroke.

I found a pic of that putter on the net, it looks like it says 340g on the head, so I am guessing that is the head weight.  FWIW, my Rossie has a gross weight of 560g.  The shaft is about 100g, and the grip is 110g, so my head weights roughly 340g-350g which is about average, maybe slightly above average looking through some component catalogs. 

There are ways to get a grip off with out destroying it.  Call or ask around to see if anyone knows of a shop that can do it. 

I have one of the new cleveland bronze putters (mine is the mallet style) but the feel that i have with the putter is amazing.  I have been considering adding one of the big fat grips to it because i think it would help with stability.  I would go back to GG to talk with one of them, they have always been helpful with i got something that didn't work as i expected.

Love the Celveland putter though!

I did the EXACT SAME THING! Cleveland BRZ blade putter (I think it's the 2).  LOVED it in the store at 35".  Bought it, put a FATSO grip on it, and HATED it!  Lost all distance control. I later realized that the one I bought was 34", NOT the 35" that I loved in the store the first time. Apparently that makes a difference with the swing weight as well.  So before I had a chance to buy a new putter, I was messing around and started reverse gripping my putter with left hand low, right hand high.  I started draining putts all over the place from many distances.  It has been so drastic,  I haven't ever changed my putter, just the way I use it.  I still think about a new putter with a standard grip, but I'm so used to it now that all the skinny grips feel terrible and my distance control today is the best it's ever been.  All my buddies just laugh because they saw my BIG misses before, and now they just can't believe it. Give it a shot if your swing weight has changed drastically, it should balance things out. The other benefit to the reverse grip is it takes that nasty wrist break out of your follow through.  

agree with all of the above.  i've played a bunch of superstroke or other fat grips.  Because of their weight (i've not used the ultralight ones), the feel can definitely change--and i'd imagine on a lighter blade putter than a big mallet it would be even more noticeable.  However, it's nothing that some lead tape doesn't fix.

I just put a Winn Lite jumbo on my fastback. I love it, but never had the swing weight issues listed here, as this grip has the same weight as the factory grip.