Hi Nick

Thanks for the likes and yes I did consider doing another vent pattern under the motherboard so the cooler air would get sucked up under that and vented out the top. However, I don't think I'll have to, as according to the management console its running at 26.8 deg C and hasn't budged yet. If it does get near the limit in the future then I'll CNC drill the holes.

I've found on a few other consumer rack chassis that getting shot of the noisy and probably cheap crap 40mm fans and putting a 120 or 140mm fan in does wonders for cooling in switches etc.