Still Stuck?
Here are a few more sequence descriptions sans images which may help you in some of the trickier situations. Since I'm not providing images, I recommend trying these on a pristine, test instance of MC4D to see what they do.
Flipped Edges
A flipped edge has one color placed correctly while the other two are switched. With a slight modification to the third three-color series, you can make a sequence to flip edge pieces. The following sequence actually flips a pair of edges.
| Top, | 4, | Left | |
| Left, | 6, | Left | |
| Top, | 4, | Right | |
| Right, | 4, | Right | |
| Top, | 4, | Left | |
| Left, | 6, | Right | |
| Top, | 4, | Right | |
| Right, | 4, | Left |
Twirled Corners
A twirled corner has one color placed correctly while the other three are in a 3-cycle (it is impossible to have a twirled corner in isolation on the 4D cube, similarly to how one can not have a single unsolved corner on the 3D cube). With a slight modification to the first four-color series, you can make a sequence to twirl two corners.
| Third Three-Color Series |
| Upper, | 11, | Left |
| Reverse of the Third Three-Color Series |
| Upper, | 11, | Right |