I've been working with Pete Caverhill, FFF Master Certified Instructor, on my single hand casting. Among other things I've always been less than impressed with my rear loops. I thought I had them cleaned up pretty good on my own, but what I didn't realize was that when I was distance casting the minute I stopped watching them they went all to heck . It was a great experience for me to have an expert set of eyes watching my technique the other night, as Pete was able to analyse and correct a problem I'd been struggling with for a long time. I still have some "unlearning" to do, and I have to integrate Pete's teachings into my casting (translation: I need to get out and PRACTICE!) but this experience really underscored for me the value of a good instructor, no matter who you are, no matter what your skill level.