I recently put together a Campagnolo EPS bike using mostly used components and documented the research that went into the build/buy decision and assembly process into this site: https://sites.google.com/site/di2epsbuybuildguide/
I thought this might be useful for anyone who is considering a switch to electronic shifting, but is wary of the high prices associated with new Di2 and EPS bikes.
During the build, I made extensive use of information on this forum. It was instrumental in helping me figure out if UT cranks would work with a certain specialized OSBB frameset and also quite helpful at various stages during the EPS installation and assembly. So, thanks for everything and I'll do my best to stick around for a while and answer questions in other threads that relate to EPS or general bike assembly.