I have lengthened my Bobby Grace M5K putter from 34" to 35" and regripped with a standard Lamkin. Something I have done with a number of putters over the years, however on this occasion the feel and balance have been lost. What are your views on backweighting and could this restore the feel of this, until now, very forgiving putter?

the overall weight of the putter will go up.
if you want to experiment with backweighting, do what i did
stack some quarters on the butt of the grip and tape them down.
i've done tons of experiments and after a year, I've decided to just not do any backweighting.
some people swear by it though.

Is this similar to Balance Certified? An authorized dealer would put different weights (2g, 5g, 8, and 10 g I think) on the butt end of your own putter to test out and once you decided on the right weight and feel, an weighted insert would be drilled and inserted on grip end of your favorite putter. It does feel more balanced. The cost is appoximately 50 to 70 dollars.

yup, that's what balanced certified does.
golfsmith has their own, i think it's called tour lock or something.
if you do a search on several forums, some people have done their homemade version with parts from home depot.
balanced certified has come out with a new thing they call the stabilizer, they place more weight closer towards the hands and not in the butt. i haven't found a review for this yet.
it's interesting. just wrap some lead tape around the shaft, it looks ugly but it's cheap to try out before spending lots of money.

Thanks for the advice, much appreciated. I have tried lead tape on the butt and lower on the shaft and, as you say it makes the club heavier, but does nothing for the balance. Perhaps the lesson for larger headed putters is - leave well alone.

hey, just to reiterate here- big fan of the counter balance- i've seen amazing results. Especially on shorter putts where momentum is more easily captured with the counter weight that makes for smoother transition. It's not about heavy mind you- it's about balanced weight that suits your stroke. I guarantee that if you check this out with some diligence, it will pay off.

Brett