I just noticed, today, that the three points showing variegation are beginning to flower. I'm going to plant seeds produced and see if any plant comes out variegated. I've tried this with Sansevierias and have had some success, probably less than one percent developed variegation.But, that's better than nothing and I should get a tremendous amount of seeds (I hope).
For a number of reasons I'm going to have to take the tree down and will try rooting branches that have variegated. I've propagated branches in the past and would let them dry out well and put them in a container of pumice and a couple of years later they rooted.
Below is a blurred picture of the flower beginning to flower. Had to use my phone instead of camera. I'll post clearer pictures as the flower develops.