This is a no pressure, easy PNG but muggles abound so please be careful and replace just as found. Depending on if the previous GCer replaced as found may need a TOT to grab from hiding spot. No room for a pen so please bring your own. First tried a magnetic but had to return with a non-magnetic. If you know why your science teacher would be proud.
Abg zntargvp. Rnfl CAT.