Isaac, how is your motor mount holding up? I am in the process of making a carbon mount. My first piece looks great but I am concerned about how little material I have surrounding the bolt holes. I know I could use a little more but not sure how much. This is carbon from HK (this mount is .060"/1.5mm, but I will use either 2.5mm/.100" or a piece of .090" I have. Your mount in #104-105. The digital picture is my next rendition. Actual part has 2.8mm material to either side of hole. Digital model has 4.65mm. Holes themselves are 4.6mm diameter.