Yes, that's also a great idea. Use compressed air and blow into the wells before removing the spark plugs.

The Quinn device that I used in the video is a torque meter to measure the torque when you tighten the spark plugs. It uses the same technology that the digital torque wrench uses. I got the device from Harbor Freight. Not expensive at all, very affordable than digital torque wrench. It comes with instructions on how to set up the torque that you wanted to set up.

Yep, that means you are in the torque specs.

With a permanent marker. I use the pliers to grab the end of the marker.

They'll be ok as long the torque is within specs.