When I am teaching classes on things that involve bearings and talk about pre-load always point out that better quality loose bearing assembles are far more sensitive to being mis-adjusted than lower quality parts.

A high quality non cartridge bottom bracket is a beautiful thing as it will run more smoothly and has better bearing support than a cartridge that uses smaller bearings... but when you get parts that are this precisely made they do and did come at a premium price and for < 30.00 you could plug in a cartridge bearing unit.