I have a well established fig tree that produced good fruit for 20 years. The last two years has yielded few if any figs. This year the tree has just one fig developing. The plant is otherwise very healthy. The trunk at base is about 2 inches in diameter. Is this plant a good candidate to be used as root stock for grafting new fig scions? Or will whatever has caused the drop off in fruit production affect the production of the new grafts?