In Free Fat Transfer /Stem Cell phalloplasty procedures, what is the best method to increase fat survival?

If someone chooses to have a FreeFat Transfer/Stem cell phalloplasty procedure; which of the following methods give the most consistent results(to decrease risk of lumps, increase blood supply,and reduce fat reabsorption)...1)centrifuge or filtration 2)if centrifuging does it matter what kit is used? 3) should PRP be used 4) is staging better than overfilling 5) does injecting fat with carbon dioxide increase the survival