Unlabelled Component holes ROG May Queen

[Guybrush]

I'm just organising my ever growing list of future builds and came across the Run Off Groove May Queen pedal.  It looks simple enough to build but I was just wondering what the unlabelled holes on the PCB are for?  I've seen them on other PCBs but never thought to ask.

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Thanks.

[jkokura]

If you look at the layout, those holes connect to other holes that are labeled: GND.

Jacob

[plesur]

You can never have enough GND points.  

The other holes next to the caps are for using caps with different lead spacing.

[Guybrush]

I thought it would be a ground thing but the spare holes next to the caps threw me a bit.  Thanks guys.  If you follow the standard wiring diagram is there any need to wire up extra ground points?