About the knife project bit
Whenever I watch Blender tutorials I've keep a close eye on the amount of vertices I have if it matches my Instructor's, now I'm having a bit of a conundrum with the knife projection bit because I always end up having lesser vertices than you had when you knife projected.
This is a photo comparison after knife projection
As you can see I ended up having lesser vertices, which confuses me because I did everything you did up to this point and somehow we ended up having different amount of vertices.
Since the next few episodes are about texturing, I'll just load up one of your (untextured) models from the source files for that purpose. I hope that's alright.