Some good advice for you Steve.

The upper and lower bearings are the same so not to worry.

Jeff had a good point, are you still using the same blades that were involved in the crash? If so they were probably damaged and you should think of replacing them. I would also recommend a blade balancer so you can throw your new CF blades on and make certain they are balanced before using them. A pitch gauge is nice but if you haven't messed with your pitch links then I'm sure your factory set pitch range is okay. Did you also track your blades? Out of track blades will also be a cause for vibration.

Mark