I was able to complete this the way I wanted when Shimano brought out the 5-port junction A box. Enve SES aero road bars and clip-ons allow for easy on and off. It's as simple as plug-and-play.
I also bought an extra Felt aero seat post so that I could keep a road saddle mounted, so as to not have to fiddle with adjustments.
All in all, it takes <5 minutes to convert from road to tri, and vice-versa. I love it!