Transmission database - for all your crank / bb / bottom bracket questions

The BB on my langster feels like its playing up. Its only been half a year at most I reckon and it feels like the cranks are wobbling when i pedal but when I look down they are not moving. Also there is a clunky, grinding sound so not sure what it is.

I use Miche Primato cranks with a Miche specific square taper BB. could it be the BB wasnt fitted correctly and has come loose? Or is it time for a new one? Or did I simply break it with my power awesomeness?

Miche stuff looks nice but it's all that rugged, chances are it's new BB time but you could check if it is torqued up still once removing the cranks. Does it feel rough?