OK, the FSA SL-K cranks mentioned above were just too good an offer to refuse given my need to go 175, even including duty and shipping to the UK. Hopefully receive them soon.
flyag1 - Did you have any issues installing them on the c'dale? How was the chain line assuming you left the front Truvativ Elita tandem chainset as is? Did you have to make any changes to either BB?
Cheers?