top...7inches from buttcap like me...just remove a coupll of inches of ur replacement grip get ur lead tape on and wrap it back...although i found it hard to wrap it again because the bulge..
I have some lead on the diagonals of my prince grip and it doesn't feel that bad. Could be more effective inside the handle, but I'm noticing anything.
if you are looking at addin quite a bit of lead then i would suggest doing it in a spiral around the handle. that way, the weight is distributed somewhat evenly and the grip is still easy to put on