If you use PD, what's your string tension? I have mine at 54 and I feel that it's a bit too powerful, I want more control, but I'm not sure what tension I should string it at. the recommended tension is like 50-55, and I heard stringing outside the recommended tension will negate the woofer effect. Some people say it's a good thing, some say it's a bad thing. What does the woofer actually do?