Making a counter balance putter

I have recently cut down a Yes belly putter and found that the swing weight at 34" was G8, which is ridiculously heavy. It felt very clumsy to use and I pushed most of my putts to the right. I eventually glued a heavy metal bolt into the butt end of the shaft and got the swing weight down to C8, which is about what I am used to, and now it feels pretty good. By the way, I just cut right through the existing grip and shaft while I played around with it, but I will now fit a new grip. Gamola Golf in Aberdeen are a good source of reasonably priced grips. If you need to work out swing weight, this is a reasonable link: