Anybody here good at sculpting in Fusion 360?

[m_c]

Fusion really isn't liking the file.
Although Fusion will load and display the original file, the STP, and IGES versions perfectly, you can't do anything with them. You have to convert them to T-Spline models, but this is what you end up with -

or Fusion crashing if you select certain options.

It's a bit of a poor show that several year old software will let you load and manipulate the file, yet something that's meant to be far more capable fails quite spectacularly.
I'll remodel it when I get some time, as it'll be a good project to learn how the 3D tools work.