Once I had photographed all of the steps in making the model I then needed to edit them all together in Photoshop. To do this I created a canvas at 640x12000px (640px wide to be wide enough for average smart phones) and stacked each photo in, adding instructions and arrows in between.
Once I had everything where it should be I then exported it as a single image. In order to keep file sizes down -especially on smart phones- I exported at ~jpeg80 compression levels, resulting in an acceptable file size of 1.1M considering its dimensions.