As much as I hate airline travel, and this trip didn't change my feelings, the saw sharpening class put on by Bad Axe was worth the two days of TSA Steerage hell.
Mark covered the basics right after introductions and coffee then it was straight to hands on. Starting with how to take a back saw apart and clean it. We went through all the stages of building/restoring hand saws, all hands on, with either Mark or one of the guys watching and advising.
La Crosse is a beautiful little town on the River and Mark is a great host, if you are interested in saw maintenance it is worth the weekend for the course.
There were a couple of last minute cancelations so instead of the usual six there were only three in the class.