I have two pitombas and maybe 6 Suriname cherries and a jambolan that has never fruited. I have found that I don't like the resin flavor in in either of the first two and I am tired of waiting for the third. I haven't been able to get my hands on the "Zill's" to see if I like them but I know I really like Cherry of the Rio grande and Grumichama. What's the possibility of top working these with more desirable? Eugenias? I have already read that Jaboticaba is not a posibility but what about Cherry of the Rio grande on pitomba or Suriname cherry root stock?