Billarf, I have updated post 1 with the new "crush washer" instruction. I wasn't 100% but I never had any issues using the washer the way I did. But since you've mentioned that your way is the correct way, I'll stand corrected.
So, I have been really busy and haven't posted my 6th oil change. Everything is basically the same. Drive the car, bring the temp up to 210+, get oil sample, change the oil, new oil filter/oil etc. Here are some pics:

Safety first. ALWAYS wear goggles.

As you can see it's been a while! Car had Blizzaks and there's snow outside.

Draining

Iron particles trapped on the magnet.

The filter is fully lubricated with oil and it's 1/4 -1/2 filled with oil to prevent dry start.

Installed.

lol I'm still waiting for the Advertisement check from Aquafina!
My Z actually has 35xxx miles now. So, I put about 31,500+ miles on the Z with Redline oil. I experience has been nothing but fantastic. Hopefully it continues this way.