I bought these from Sillyoldelf a few months ago and they are truly amazing so I hope all of you that want them do get a set - you will be impressed! I installed mine with the play field in place. Made me nervous as hell that I was going to screw them up but they are surprisingly hearty - I tested them . I "unstuck" them several times in a few places to obtain better alignment and they came off and re-stuck just fine. Unlike mirror blades I strongly encourage you to have a second person when installing these, however, as they tend to stick to anything/everything, so four hands are better than two. Make a dry run on placement (before removing the backing) and use short strips of blue painters tape in 3 or 4 places such that you can align them exactly in the same place once you remove the backing and are ready to "stick". This works pretty well, especially with help (I used this method on my wife's TWDLE with Stern's wall art, had not thought that far ahead on my MB - it was my first time ). And, the blue painters tape leaves no residue on either your machine cabinet art nor the decals. I thought about removing the play field to install these but just could not muster the courage to do it. It is a bit nerve racking but take your time and get an extra set of hands involved and it's manageable. Good luck!