You didn't necessarily screw up. The needle shaft is a bit fragile. I broke mine the same way. I wound up buying a remanned speedo when I was at Jim Carter a couple years back. And IIRC it was more than $125. I would check with your local shop and maybe they can just replace the cup and shaft for you if everything else is in decent shape. Or it might be better to get the whole thing redone. Jim Carter supposedly does theirs in-house, but local shop should be just as good.
