Repairing Makita Cordless Drills

Remember that trunk-full of broken tools I got from a local fabrication shop? Well, there were 7 cordless Makita drills in the pile. A BDF452, two BHP451, a BDF451, a XPH03, XPH07, and a XPH12. See links below for the parts and tools I used:
Makita CB440 Brushes (195021-6):
amzn.to/4g4IXHp (affiliate*)
Makita Speed Change Ring (419558-2):
amzn.to/3VxRJGn (affiliate*)
Makita Gear Case (419252-6):
www.ereplaceme...
Makita Battery Adapter:
amzn.to/4i2yn5z (affiliate*)
Mobilux EP 1 Grease:
amzn.to/414ZWVP (affiliate*)
Snap Ring Pliers:
amzn.to/3eHsQ5l (affiliate*)
Loctite 545:
amzn.to/45Olc2d (affiliate*)
*Purchasing from these Amazon affiliate links earns my channel a small commission. Think of it as a tip that doesn't cost you anything. Thanks for the support!