The gear puller is the best method because the only stress you are putting on the engine is from the tip of the crankshaft as you pull the drive washer off. This is a reusable tool for other engines.

For rear bearing removal, I heat the case at 250 f for starters. Use oven mitts, and hit a piece of wood like a 2x4 and see if the crankshaft and rear bearing will come out the rear. It sometimes takes reheating a bit higher. I had to go to 350 f the last time and I was worried it wouldn't budge, but it did. This is an engine that has sat for 25 years.

For the front bearing I have sanded down dowels that fit up against the bearing back. I used the heat gun for grins one day on that 25 y/o engine and the front bearing shot out. It usually takes reheating in the oven.

Yes, that thin gasket for the cam cover is necessary. The cam gear should have a dot for orientation.

Anybody need a Club Saito membership number?