Sam As for the smoothness issue, I know it sounds daft, but are the bearing races in the correct way round?
Do you mean the bearing cages - not the bearing races ?
To avoid this issue simply remove the bearing cages completely (obviously this only works on a loose ball bearing BB) - not only does this make your bike weigh less (weight weenies take note !! :D) but your BB will run that tiny bit smoother/freer.
The cages main role is aiding the construction of the BB, beyond this they have no functional role.
Do you mean the bearing cages - not the bearing races ?
To avoid this issue simply remove the bearing cages completely (obviously this only works on a loose ball bearing BB) - not only does this make your bike weigh less (weight weenies take note !! :D) but your BB will run that tiny bit smoother/freer.
The cages main role is aiding the construction of the BB, beyond this they have no functional role.