I have a mechanical question about my PT wheel. Ever since getting it there has been an odd play in the wheel. I never noticed it when riding, so I wrote it off as just a characteristic of the pt hub. Today I realized that the big aluminum nut on the non drive side was loose. I finger tightened it and the play is gone. How tight should that nut be? Is finger tight acceptable or should it be tighter? And could I have hurt anything by riding with it loose?

Thanks!