I've been looking at strings alot. Im kind of a novice in this area, so i have a couple questions. How does gauge affect tension? (I like rather tight string tension) How does nickel compare stainless (as far as tension and string life) How does flatround and round wound affect tension? On a side note, would a nut filed for BEAD still work for EADG, or does the gauge difference not matter too much as long as it fits?