I agree with Andy on the reduced service life of the Octalink bottom brackets and their cousin, the ISIS bottom bracket standard. Both sought to improve the interface between the crank arm and the spindle, while increasing the spindle diameter and making it hollow. The crank arm/spindle interface was an improvement, but the tiny bearings required by the larger spindle were not very durable or tolerant of contaminants. As a result, they usually had a very short service life.