Things I have done, when I was a trainee...

Must be around 1989/1990 when I attend an industrial training at the german Telekom, then called "Fernmeldeamt". This training was obligatory for studying study paths like electrical or mechanical engineering.
Over some weeks we had to build a lorry...

...and later the Frankfurt telecommunications tower.

Okay, I had some spare time between years, so I have drawn them in 3D CAD. This is how it would have looked like if I had taken care for the correct dimensions :-)