So I'm considering putting flats on my precision because I love the smooth and thumpy sound, but I'm hesitant. I've only ever tried flats once (they came installed on the p when I bought it used) and they were INCREDIBLY difficult to play. They felt so stiff that I couldn't get through a single song without my fretting hand aching and cramping up. I believe they were some kind of Fender flats. Now, I wonder: is that just how flats are? Or are there models out there that are more comparable to rounds in terms of comfort? I typically play D'addario nickel wound rounds, 45 - 100 or 105, with no issue. I'd really appreciate suggestions on flats that are in a similar ball park (if they exist) from you guys.