I was pretty sure I'd have to change up some things, but thats OK with me. If I have to spring on some new or used parts to get what I want, that's OK.

Harris has a nice adapter for mounting the nexus shifter on drop bars.

Thanks for the head's up on bar diameter differences.

Judging from my pictures, is there an opinion that I should change out the stem too? I'm thinking something with a bit less angle and more extension. If I go with moustache bars or something similar I could probably get away with the stock brake levers? Drops would probably require me to change lever sets?