[Aisle 6]

I have tried many patchbays and all the cheaper ones will eventually give an intermittent fault particularly in the normalised switching. Otherwise they get a little dust on the contacts and it causes a higher resistance through the signal path which then changes the tone of the signal.
I have now used old Telco brass barrel long frame bays and they are never a problem and are more resilient to dust and contaminants. Well worth the money.