I haven't posted to my thread in awhile.
Although I liked the gearing with the IRD crank, I eventually replaced it (along with other components) with a Campy Athena-11 speed triple on my old Bianchi. I don't know whether it was the IRD crank itself, or the square taper bottom bracket I had, but it would flex enough when I would stand up on the pedals to rub on the FD. The Athena-11 crank and new BB are rock-solid.
I haven't done anything yet with my other bike, which has the Di2 restriction. (I found I could make it up Alba Rd with what I have, albeit struggling.) I had my eye on the newer White Industries 30mm crank, but now I am afraid there might not be enough room for it and my Di2 wire in the BB shell. I've decided to hold off until I find the perfect solution.
Anyone need an almost new 46/30 IRD crank?