My friends Valencia Pride on Florida rootstock just died.
My other friend that just joined the forum posted a picture of his Tebow mango on Florida rootstock and the original graft completely died back to the rootstock.
Manilla or Ataulfo rootstock will be best. You can learn to graft by watching YouTube or you can join the California Rare Fruit Growers(CRFG). Jim Neitzel gave a demonstration on grafting mango and I gave a demonstration on Double Stone Grafting at the last meeting.
Some people report good to excellent growth for vigorous varieties on Florida Turpentine rootstock but the droopiness is still there. I highly recommend you graft onto the rootstock mentioned above so you don't waste your time. I wish someone warned me when I first started growing mango.
Simon