The author remixed this model.
I wanted a way to attach the rii mini BT keyboard to my legion go. I took the protective case from here: https://www.printables.com/model/731894-lenovo-legion-go-protective-case
and added a bracket attachment to hold the keyboard, using the keyboard bracket from here: https://www.thingiverse.com/thing:6465346
I did find the original protective case to be a bit too small in the Z and Y directions, so I also added 0.4mm of relief in both those axes. I printed both files using supports.
This iteration is a slide-in version. You can slide the keyboard bracket when you want it, or just take it out when you don't.
The kickstand on the Go still works without interference.
I am working another design iteration that is hinged instead, so the keyboard angle can be adjusted.