If you only need to install a new 2.5" drive (e.g. SSD) in a 3.5" bay, print only model 1. If your computer has an SFF case and you need to install 2 drives in one bay, print both models and combine them. The adapter allows you to install two 2.5" drives in one 3.5" bay.
Edit 09.06.2023
I added to the next project: additional mounting holes (you can mount the disk in reverse), I slightly changed the dimensions. The version 4 (V4) print is visible in the white filament photo.
The author marked this model as their own original creation.