We are posting this as a WARNING! We did post on youtube but the maker of the video blocked us and removed our posting, So we are posting here to protect our customers. This video was posted on youtube.
http://pinside.com/pinball/forum/topic/biught-3-pins-2-day-08-fg-ngg-bop-b_r/page/2
You can NOT work on your machine very easy if you do it this way. You will damage your mirrors if you do it this way. Not all machines are created equal and the playing filed may not be as forgiving. Especially in older Williams, Dataeast machines or older Sterns.
The felt added to the playing field will break down and you will get sticky all over your playing field. We have already done all this testing before we ever sold to the public. Also, when you add to the back of the mirror you push it closer to the playing field and risk scratching the mirror. Not to mention the fact that removing the mirrors to work on the machine is much harder to do. Or if you sell your machine and want to put them in another. We do not mind people giving their ideas and we will test. You guys are more than welcome to post anything here and we will not remove it. If it works for you great but please keep in mind, they may not own your type of machine. FYI: We have already shot a video of installation and it will release with our new website in the next 2 to 3 weeks. We have found #1 failure of installation: Not reading the instructions. People see the 3 screw holes (which are below the playing field and can not be see at all) and they just go to town. We seen and heard it all. From installing them backwards, to not pulling the backing off before installing them. Please just read the instructions.
Also, We will be introducing a new sweet product line at the Texas Pinball Show. Hope to see you there. FYI: it can be done this way we just do not recommend it...