You can make a tool from the chuck end of the right size drill bit. You want your tool to fit the hole so you don’t tear it up. I don’t think you need to change the lube every time but you want to be sure there isn’t any water in it. 105 is more expensive than corn head grease but it is an assembly lube. It is used to protect high pressure parts when starting a fresh motor for the first time. I believe this is beneficial for gears when you consider the load being put on them and its what I use. Is it necessary? That’s up to you.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
