1. Do we have a canonical mechanical way to determine if one character knows about the Catch of another character/monster type? Alternatively, suggestions for house rules to handle this? Some sort of Lore roll? Maybe require research beforehand?
2. I'm having some trouble with some of the listed Catch values. Red Court Vampires get a +2, assuming a +1 for knowledge, that would give a +1 for availability for "sunlight, holy stuff; no armor on belly." Now, sunlight is tricky, but should holy stuff really be just a +1? You can get holy water at any Catholic church, right? Also, how do you determine availability for weak point style catches, like the lack of armor on the belly? Also, for White Court Vampires, I don't understand why the Catch is only a +0. I understand that True Emotion is supposed to be rare in the Dresdenverse, but is knowledge of the weakness really that hard to come by?
3. When it comes to catches that are weak points, how do you do called shots? The only example I could find for called shots in the book was a maneuver to place an aspect on the target, like "Hurt Knee", which doesn't seem directly applicable. Somewhat unrelated question, but could you do a called shot to bypass mundane armor? (e.g. "He's got a Kevlar vest on, so I'll shoot him in the head.")