Thanks, Null! I have only three varieties of Dragon Fruit's (White, Red & Purple) but I hate throwing away perfectly good cuttings, and don't sell on the auction sites, so I just keep rooting them! :)
Right now, the Cavendish is in a 45 gallon SmartPot, so that should be plenty to get some good fruit, but seeing how full it is, I think the next one is going to get a 65 gallon. I have a baby Williams Hybrid and one of the Cavendish pups growing also, but both are still very small and in 1 gallon containers.
Thanks for the recommendation on the thicker skinned fig varieties! So far, I haven't had any fruit fly issues, but then again, so far, I haven't had much fruit, either! :)