There is this one:
chassis3.stl (1.3 MB)
It’s what I used for my Graflex 2.0.
I can find the source scad file if you want it.
Here is what it looks like installed:
The battery is soldered in.
I have a graflex helper board to make it easier to program.
The control box is a touch button: ProffieOS Documentation: Touch Buttons
I use a 9-pin aviation connect to connect to the blade, and charging is done using a charging adapter.
If you want to set up your saber differently, probably need to make some modifications to the chassis.