Hello everyone, I'm building a perforated panel to solve some issues in my room, but I have a question about the construction: It was calculated that the holes should be 10 cm apart from the center of each hole. How much can I deviate? Is it necessary to be extremely precise? I'm trying to do it to the millimeter with a ruler, and it’s quite stressful. I’ve already completed one, and it took me 2 days to finish the whole grid and then drill the panel. It would be great to just take a strip of wood the length of the panel, mark it with a pencil from one end to the other, and get it done in 20 minutes, but I'm not sure what the tolerance level is for the distance between each hole.

Forget hole center to center, instead think that each hole should be placed centered on a square - "hole distance" x "hole distance".
so if the "hole distance" is 10cm and the box depth is 20 cm, it should be 2 liters behind each hole(but no dividing walls needed)

But, if you measure with the calculate "hole distance", all holes closest to the inner walls of the box should be half "hole distance".
For Example if the "hole distance" is 10cm there should be 10cm from hole to hole for all hole but 5cm from holes to inside walls of the box.