Strange, I wrote a reply to this yesterday and thought I'd posted it, but ....!
Ed, this is your 3rd posting and each is a magnetude better than the last. This 16" platter is a fantastic piece for someone who only started turning late last year.
Not detracting from the platter, if I can make a comment about something else you said, 3am finish.
Wood turning is a Lone Occupation and accidents do happen. And if you are out there until that time in the nightwhen something untoward happens you'll likely not be found until the morning. Yes, it's wonderful to be so captivated by what you are doing, but it's also necessary to consider personal safety and risk.
I don't want to bang on the H&S Drum, but the worst times for accidents are when we are learning (and don't know), and when we think we know it all (and become overly familier), so please be careful.
Bryan