Using using STL files for anything other than export can cause problems. I use DesignCad Mechanical (free from RS Components) and always save my work in the default format, exporting to STL only before slicing. I've never found a reliable way of importing an STL file and modifying it.

This thread reminds me of when, while driving around with the kids, we used to play I-Spy. After a short while basic clues got too easy so we graduated to things like "PIFATSOTR". This, obviously, is for "pylon in field at the side of the road".

If only I hadn't been such a smartarse...

Motet

Look out for thunderbolts!

Take up jogging. At 27 years old I found out I couldn't run a mile. So I made a plan to stop on the 2nd Sunday in January (after Xmas & New Year excesses over). Told everyone I met of plan. DID IT!!! Within 3 months was running 8 miles and enjoying it. Only downside was re-educating my palate to enjoy malt whisky. Never smoked again and 40 years later I'm fatter & lazier, but still here. It's worth the effort.

Go through the new screen with a knowledgeable user, then get him to tell the boss it's crap and will cost him customers.