I have a Tahitian Lime which is probably over 20 years old, it has been
potted all its life. Although it has been repotted several times Im sensing
that its years are numbered. I would like to graft or bud from it this
Autumn but have no idea what to graft it onto. Can anyone help ? What is a
good compatible lower section ?

Any additional tips of the process would be helpful.
Thankyou. M