I tried to keep all names and values this time, this way it's probably easier to spot mistakes etc. I might get rid of those voltage dividers and opt for a straight 3.3V design. My 5V ftdi adapter broke and after some research about those switchable FTDI adapters I'm not afraid anymore, that the jumper only toggles the power voltages, but not the IO voltages. But the common chips used in those boards all feature a VBUS or VCCIO pin, that should be connected to that jumper as well - so yeah. I was about to design an adapter myself, but those adapters are just too cheap on ebay. The pin headers are a different most of the time, though. I've seen Ben Heck using the locking footprint for programming, so no header would have to be soldered.