Thickness Gauge

[Noitoen]

While reading through PM magazines I came across this little gadget
http://books.google.com/books?id=DuMDAAAAMBAJ&lpg=PP1&hl=pt-PT&pg=PA174#v=onepage&q&f=true

 

[gunboatbay]

This is the modern-day version of the same thing

 

[Noitoen]

This is the modern-day version of the same thing

That I know. It's the joy of building something that drives most of us.
Sometimes you don't have the money to buy something but, with a little spare time and some junk lying around you might be able to make it