The hinges and top are unchanged from the original.
The block is also great to hold the tips stand alone. TPU recommended.
20% infill
0.2mm layer height
No support
Body in PLA
Block in TPU
Hinges in PETG
8 M3x20 screws for the hinges
Modified in onshape, model: https://cad.onshape.com/documents/a9324c6d8c8bce121d025576/w/0968642d24e2a75675a465ed/e/b2b257e1e7a90c49f525e0e2?renderMode=0&uiState=6675b23da88ea754c7e6a6e9
The author remixed this model.
The tips were either too lose or too tight for my taste, so I separated the tip holder part to print it in TPU.
The box bottom now has a slot to put the TPU block where the tips are inserted.
The hinges will feel very tight, even quite hard unlock by hand. Leave it closed for a day or 2 and it should be fine