I want to do some very basic editing of STEP files, e.g.: I need to do this sort of thing about a hundred times, so I'd rather learn how to fish than pay someone to do it, even if it's only a few $$ ...

Tracking exercise is a lot easier than it used to be. Back in the day, you needed a notebook, there was a lot of estimating, and it required your full attention. These days, apps and devices can keep ...