Do the 3 holes instead of 4. Imo looks better, dash will be stronger in this place and it will be easier to do because of one less hole to drill
Oh and you can still use your oem ventilator duct behind the gauges.
Basically when it comes to drilling holes with a saw you have to do it VERY FAST. Other than that you will just mess the dash surface around the holes.
What i did is i made a smaller hole (54mm for example) with a saw and then made it bigger up to 60mm with a dremel tool.
It is more time consuming but a safer method for sure.