My earlier comments pertained to Campy's carbon cranks, not aluminum and further noted that R&E / Rodriguez has for many years modified alloy Campy cranksets for use on their tandems. But, if you feel better now, then I feel better for you.

Frankly, I don't give a rat's-arse what anyone uses on their tandems. But I do try to make sure they are given sound recommendations and/or understand what is and is not used and why by the folks who have logged enough miles on tandems to learn what lasts and what doesn't.