I'm quick posting, b4 I have to go out again, so I haven't reread the thread.

+ Basically, don't mess with calcium or alkalinity unless you have a concrete pool. (Don't mess with alkalinity till you've fixed calcium, if you do.)
+ Don't turn your SWCG on till you have an acceptable salt level.
+ If your SWCG is not oversized, it may not be able to deliver enough chlorine at 15% and 6 hours -- remember that it is off (or should be!) when the pump is off.
+ Read the "Best Guess . . . " page (link below) and set your chlorine level using it.

Ben