Was having difficulty in installing the banger in my Zipper. Went to my photo file and discovered that the motor mounts were swapped side to side. I have over 450 photos showing detail stored on an old Mac Pro in the shop and refer to them all the time. Also have photo files on several house remodels that have proven invaluable. An old tablet like an iPad might even be better as you can use it to take photos instead of a phone.