You probably want to make sure to plant a few trees. Pili nut is dioecious (male & female on separate plants). (I hate to bring this up, since someone always seems to know of a tree somewhere that is self-fruiting. However, I would hate to plant one tree and find it never fruits so I wanted to bring this to your attention.)
John Mood had been a big proponent of pili nut and probably was responsible for a lot of interest in it here. However, a few years back, HTFG has a guest speaker in from Africa (Paul Noren) and we got a private tour of the Hilo USDA facility. We tried C. harveyi and we both felt it was at least as good, probably better, than pili and was very heavy bearing. If you request pili nut seed from them, maybe you should also request the harveyi as well (and, yes, harveyi is also dioecious).
John