AMEN! to the di2 being cheaper, that WOULD probably be easiest fit, but trying to hang on to the house at the moment, so those are NOT in the picture at all! He has been test riding other folks bikes with different shifter set-ups trying to find something most comfortable for him. We are playing with a spare set of bars with an aero bar attached, thinking bar end shifters at the end with a brake handle up there too might work, but intown traffic might mean more heads up biking, so perhaps the back wheel brake on the normal spot and front wheel on the right/aero bar position. Tinker, tinker, tinker. He loves "haunting" the local TREK shop, though he has also been looking at some GT's. Whatever his next, bigger bike is, it will have to be a used one. He did take a minor spill last week when trying to slow down and shift in quick order due to pedestrian traffic on the trail, he got a little wobbly and caught the edge of the trail and down he went. No major damage except to his ego, and a small scuff on the vintage, pre-scuffed brake hood