In one of my road bikes i wanted install different bottom bracket. I cant screw in the bottom bracket i take my bike In LBS and tell me needed use the bottom bracket facing too.l. Is charge me $30. When i come back home i see the mechanic had install wrong the crank arms. In wrong angle. I should go back at the LBS and show that mistake? Is not should the mechanic be more professional? Also how i can see if the bottom bracket is good? i ask the mechanic is tell me is good but i turn the crank with my hand in one spot i feel is little harder to turn.