Rear main seal Qs

[shakenfake]

Alright getting ready to do my rear main install this weekend. But got some questions

1. Do I need an alignment tool such as this: https://www.summitracing.com/parts/sum-900335
I have seen people just pop the rear main on and go basically so I don't really understand why I need this. Also I am a bit confused on the function of it. I read the directions but I feel like I have to be missing something.
2. I use oil and not grease when lubing the seal correct? I thought that the grease may heat and mess with the rubber so I was going to use oil instead. What say you?
3. Blue loctite on the fly wheel or no?
4. RTV across the entire oil pan gasket or just the corners?

These may be basic but I see contradicting stuff concerning these so just want to get it straight. Thanks lads

[shakenfake]

Basically to answer all my questions for anyone else wondering

 

1. No if the rubber is already installed in the rear main cover.

2. Oil not grease

3. Blue loctite 242

4. RTV just in the corners

 

I am having difficulty mating my transmission back to my engine now because my motor mounts are so worn out. Going to replace them with some GM Genuine mounts. Should fix a lot of the issues I have been having the past couple months and make things a bit more solid. I was going to do poly mounts but I'll wait on those.