Agreed. Such is why I referred to the Octalink that came stock on the Trek 7.5 FX I bought last year as: The ice-cream churn. And the ice-cream had thickened considerable. In terms ease of spinning freely, bottom-brackets go from the easy to the more resistant thus: Square-taped with loose bearings. External-bearings. Cartridge-bearing such as Octalink. This is the usual scenario, but by no means is this cast in granite. There are always exceptions.