I have repaired the 3d model and divided it into 2 left and right
and also removed the upper buttons (will be difficult to push with hard plastic)
It will be easier to 3D print this with a smaller 3D printer.
And it doesn't need much support material.
The model can then be glued together or taped
i will try re edit this again whit some snap connections maybe
Made a test corner of the model and it fits like a glow
but the button hole needs to be moved 1-2mm but it works
have not yet testet the tracking.