In regards to your 2100, if it's an earlier model, it might have the LF motor, which is not as good as the SJ style. After the LF came the roller bearing to roller bearing that Erick has spoken about. We have a 2100 that has the lf in. On the exhaust plate, there is no ridge to attach the combination tool. I don't know if this is a way to indicate that it's an earlier model and might have the lf style motor in or not.
In regards to lubes, I'm using Mobil 1 synthetic 5w30 motor oil on the sleeve bearing, for the roller bearing, I'm using either Mobil synthetic grease, or lately Red Line synthetic grease. Using these in my car as well. Will never go back to conventional lubes again, as the synthetic lasts longer and is much much more durable.
Vernon