Hmm, well.
The Interactive Timeline is now filled out, with everything from my latest timeline except for a couple of speculative birth years in the pre-Finding era. But Google Sheets won't let me give you the ability to select options without also giving you (and anyone else who wanders through) the ability to delete the entire thing. I'm going to have to turn it into a website to make it work.
For now, though, the "Interactive Timeline" tab shows my best setup using the BBC figure of 7500 years between the separation of the Nandor and the fall of Morgoth. The children of House Finwe do, in fact, work! The only exception is Galadriel, who as ever is impossible to fit to her two latest facts: "older than the Silmarils" and "not an adult at the Exile". We just have to make do.
hS