Will you look at that, I actually straight up succeeded at a test!
One question, though: having taken the Aim action I could re-roll 1d20, but it's not clear to me whether I'd have to use the new result or not. The only mention of any such rule I could find concerns re-rolls gained by spending a Luck point, which do force the PC to accept the re-rolled outcome, but nothing general.
Basically, if I can decide to keep the original result I'll re-roll and hope for a 3 or lower so as to score an extra success (Tag skill!). If not, I am definitely not going to risk turning my success into a failure. 😛