These are password protected and the password is all lower-case:
a3dp
Here is an embedded viewer of the 300 A3DP Troodon in all of it’s glory via Fusion 360 Cloud Viewer.
Link to the model in the Fusion 360 cloud:
https://icloud14783.autodesk360.com/shares/public/SH56a43QTfd62c1cd9686686412699ae42ba?mode=embed
