flaxvert I've re-instated post 1 from that thread, using a copy/paste method from the Lithium export data.. The content is there, as well as some of the layout.
I'd strongly recommend simply using the text as a guide and rebuilding the thread from scratch, as things like @ mentions, spoilers, and so on will not be easy to re-insert by editing (due to the format differences between Lithium and Flarum). What you'll see on this post, is essentially a HTML post, and as you know, Flarum does not technically support them 😉
I'll wait to hear your thoughts on this before I recover any other posts... Do let me know if you run into any issues!