I've been using a $4 dollar magnifying glass from Walmart. Any suggestions on a better searching tool or brand? Why are some errors a big deal as some are not? And for my own knowledge, who decides and makes those decisions? How should coins be housed? If a makeshift housing, what has worked for you? And last but not least. What are the ABSOLUTELY DO NOT DO'S when handling, housing, or dealing with coins? Thank you all so very much. Oh yeah....any coin shows in Southern California Area coming up anytime soon?