The original model from Kandyhouse who already remixed it to fit the Geekup Bits, still was to small and did not fit the Mega Box in a nice way.
Since I wasn't able to remix it on stl basis I kinda rebuilt it and did some modifications. For the white bits, since they are so many I set up an additional tray with no radius at the bottom. Because of this I can give you the STEP Files for easier modifications of yours.
I also attached the Quacks token from pierredesa which I modified in size because they didn't fit mine.
If you have ideas for further modifications or need other sizes I can modify them for you as long as you give me some time. :)
Bits printed in all necessary colors, the boxes I did with the Copper Brown Metal from Babulab