Stuff that I make because I want to but don't really have anything to do with anything I sell:
Exit order demonstration
Swedish sigma questions and decision tree. Can contain mistakes
Swedish sigma decision tree, can contain mistakes
Sigma manual questions and decision tree. Can contain mistakes
Sigma manual decision tree. Can contain mistakes
Play with mass balance of a cessna 208B. Don't use this for your own mass balance calculations. (metric)
Dummy altimiters that can be used as freefall timers if practising on the ground