RE: T Rex 700E F3C
I have so little time at this hobby. That I wear nothing out. My packs die of old age and little use. Which I go for the HK packs, so throwing them away does not hurt so much. However I do pack decent grease into the bearings on all new builds I do. With a tool called "The Greaser" and some high speed bearing grease. Think I got the combo at HeliPro South. I found that Align bearings usually come with the average of just a coating of grease in them to nothing at all. I have a particular RC car with a bearing that supposed to self destruct in short order because it is too small for the application, last a long time.
Align uses a drop of green lock tight on the end bearing. I use a micro torch, heat the outside of the grip and use the spindle to get the bearing out.