I hadn't click the link until now and recommend that anyone how hasn't clicked to go ahead and do so.

Picchio, thanks for providing and excellent resourse!!!

Andy I think what your trying to get at is how do you know if your particular cranks are pre or post CPSC/1977 cranks which in turn determines the BB you'll need. I'm not sure but there may be a subtle difference and my recollection is that it had more to do with clearing the lip on the CPSC front derailleut than anything else. If in fact it was all about clearing the CPSC FD I'd venture a guess and say you can use the either spindle.* * = speculation on my part.