Hey ya'll With the forutnate find of a Sekonic L558, I am about to embark on the journey of spot metering. I think I've got the basics down but only practice and experience will carry me through. I am curious about some of the advanced functions of the L588, like filter compensation. Do any of ya'll use that feature? I read the manual but you know those things are written so weird it's kinda hard to translate it into real-world applications, at least it is for me. So, Sekonic L558 users, tell me your thoughts (please!) Thanks!