I would use Yamabond 4 on the center cases, I would not use any Silcone based sealant as gas can eat it. On the clutch cover or a gasket I could get to easily it wouldn't bother me but on crank seals and center cases yamabond only and have never had an issue. I too think 3 bond and yamabond are the same.
One thing to keep in mind some of us are older and set in our ways, there may be other stuff out there as good or better, we just use what has worked for us.
As for the lower bearing puller, I made one based on the motion pro puller, it works like a dream, I don't have a photobucket account but if some one has one and wants to post it I'll send pictures of it.