[PEDA] imperial or metric, mounting without pads

[tastingfan tastingfan]

Hello,
   
  Is it possible that the ways of input are switched between imperial and metric units?
  There are some components such as switches and potentiometers which must be mounted on the PCB board with screws, not with pads. Do I need to place vias for the mounting? As far as I know, vias connect layers electrically. But I need only holes in this case, is it a problem?
   
  Best wishes,

 		
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