jgilbert, Also, I dumped this publicly some time ago and didn't say anything about it, but:
Should you need #openscad models with accurate dimensions for various storage form factor devices, such as a 5.25" full height drive, or a 5.25" optical drive, or a 2.5" internal HDD, with a variety of connector locations, all direct from SNIA's online specifications, I got you:
https://github.com/jon-gilbert/storage_device_dimensions
Two #openscad models of a 3.5" internal hard drive, top and bottom. The bottom diagram is spun 180-degrees on its Z-axis, showing a carved out SCA-2 connector.