Having closed cases to prevent interference from complete strangers makes a lot of sense. I’ve had incidents of malicious individuals removing cables or flicking switches in some racks. Putting a blanking plate on to the rack is one way to overcome this problem, however unscrewing is a pain if you need to make quick changes. This door is very helpful in achieving that, but fitting my hand through this particular door is tough, and difficult to remove my hand again. If space allows get something bigger, but I’ll have to settle for this in the meantime.