I feed F/T and just started breeding rats. IMO I like feeding F/T feeders last long, don't have to worry about parasites transmitting to snake from feeder, a snake feeding on F/T should have no problem accepting live, but most won't go the other way around.

Everyone has their own preference. However if you do switch to F/T I would feed him some live or pre-killed for a few weeks then start feeding F/T. I'm not an expert, but I'm sure someone will correct me or provide a better solution.