Thanks for all your replies! I will wait until my kuini pushes some new growth. It grows relatively slow compared to my other tropical fruit plants (sapodilla, guava, cherimoya), but of course i have been neglecting it.
Did you guys topwork the kuini rootstock with the scion, or you graft onto its branch? I am planning to still try to get some fruit from the kuini rootstock. The seedling looks like a trident now, with one branch on each side of its main trunk.
Is it better to do the graft onto the main trunk or on either of the branch?