External Bottom Brackets

This is pretty much my view too. Once the bearings have died, chances are there is going to be some distortion to the cup, or the bearing may well have seized and slipped around in the cup, making it oversize, so pressing fresh bearings in is just a waste of time /effort.

Which is why, IMO, Trek are wankers for putting BB30s or whatever those stupid arsed press fit things are called, on their mtbs. We have had so many of them go wrong.