micka,
If you have movement in the crankshaft the seals will be gone again. It is easy to check if the bearings are worn by just holding the blade plate and see if you have any sideways movement. If so replace the bearings and I would also replace the rings at the same time.
We will have a kit in the online store soon so keep a look out because we are updating all the time with new products as request are made.
