To answer your specific fork question, this thread has some useful information. If you see my post #26 (linked), you can download and reverse engineer the CAD file:
At some point I will make more Fusion video tutorials, but I am too busy right now! Reverse engineering someone else’s CAD is a great way to learn new tricks and workflows.
I am sure you have seen these resources as well:
PS. I moved this thread to the Fusion tech support topic!