  
  width of the "finger hole" in mm 

 additional pin for better positioning 

 position(s) of the extra locking springs in the lid 

 style of the fingers 
  space at the start and end in multiple of normal spaces 
  height of the bottom lips sticking out (multiples of thickness) FingerHoleEdge only! 
  space below holes of FingerHoleEdge (multiples of thickness) 

  width of the fingers (multiples of thickness) 
  extra space to allow finger move in and out (multiples of thickness) 
  space between fingers (multiples of thickness) 
  width of finger holes (multiples of thickness) 