Here is what I did. Put the Surinam cherry in a bowl of cold water and let it sit for few hours. That is make it taste a lot better. If not eat the peel, totally tasty. Cold water is cold not room temperature water. Add ice to it is even better.
Al, I found out as my Vermillion tree gets older, the aftertaste is diminished to almost none, especially if you pick it fully ripe (it will fall right away when you barely touch it).
The taste is extremely sweet with mango aftertaste.
I also just purchased a Lolita suriname cherry that airlayered from a 20 years old tree. My tree is in 5 gallon only, but very productive and the fruit does not have any aftertaste, eventhough it is not as sweet as my Vermillion in ground. But I expect the fruit to get better after I put the Lolita in ground.
You are welcome to have some cuttings from my trees if you want to graft it unto your seedling. I can share the ripe fruit (it full with green fruits now) if I happen to be on the way to your place, because once you picked the ripe fruits you have to eat it right away, otherwise you will loose the wonderful mango aftertaste.