Can someone explain to me why everyones so convinced that facing and chasing a bottom bracket shell is a necessary evil? I mean, whats the actual benefit of removing a few microns of material to true the shell? Is it really going to make that much of a difference in the grand scheme of things? And dont even get me started on the tools required - its like the industry is just trying to sell us more gadgets we dont need. Cant we just, I dont know, focus on making better frames and components that dont require such nitpicky attention to detail? Or am I just missing something fundamental here?