On confirmation of roles, by the balance of probability I could prove to myself that it was likely that FoU was roughly twice as likely to be Investigator than Evil. Similarly, TBF was twice as likely to be the 'Special' as Evil. Unlikely that either were the role I knew to be my own (depends on the Mod's hidden agenda) and unlikely that each was the the other's most-probable.
Hector (as I said) was unreadable. Equal chance of any role, but adjusted by the above assumptions you looked 'least not-Evil'.
FoU's revelation tied down several of my assumptions into fact (primarily FoU's presumed role and your presumed role, but also flavour details). Too much to so easily be an accidentally convenient lie. Then I just had to not look scummy myself. (Though I was possibly the most expendable, so was perfectly willing to make myself a night-kill target if it still helped the power-Townies.)
I'm not sure I would have played the Evil role any better, although I know I would have done it differently. Won't explain how, though, in case I find I need to use that tactic myself, later.
(Ninjaed by two, now three...) TBF: I was at the start very tempted to pepper my opening statement with phrases like "I don't want to be a washout", or something better, to clue in the (assumed) Townie with the water-skill that I had something like that as a Town weakness. But couldn't work out how to phrase it without it possibly backfiring.