Step by step measuring guide    
  Congratulations!!! You did it....
Now it is time to double check your self. The way to do this is very easy.

Just add the following numbers together to get the measurement indicated.

for example:

Add measurements #3 and #4, the sum should be almost the same as #2. No cheating please.

  1. #4 + #3 = #2
  2. #15 ´ 2 + #17 = #11
  3. #23 + #24 = #25

If you find the differences are too big please, check the measurements again.