Thanks DarkVctry! Also, thank you for the tip, Koga. It's now extremely hard to apply the foam well, so I'll likely follow your advice.
I wanted to wait until the six month mark before posting another update, but I checked out my hair today and I felt it was a good time. Below is a comparison photo. On the left is my hair a little less than two months on minoxidil before I noticed any regrowth and right before I started dermarolling. On the right is my hair today. Since my last photo updates were dark, I did my best to recreate the lighting and angle in the current picture so the comparison is as accurate as possible. If anything, there is more lighting in today's picture. Also, hair length is about the same.
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I've gone from a NW3 Vertex to a NW2 in less than 6 months. I'm very happy with the results!