Originally Posted by KC10 FATboy

I think using a set of charts made by someone who assumes no responsibility if he's wrong isn't very safe and would probably result in a long talk with a check airman if they saw caught you using them. Why not just use the materials provided by your company? If they aren't good enough, make suggestions for a change. Sure, in a pinch these are cool, but I would always go back to the source document if I could.