Filament Holder (No Hardware)

After purchasing new filaments, I urgently needed a desiccant box to store them, so I needed to print some holders. However, I downloaded many similar models online and encountered many problems during printing.
1. Printing often failed, and the bottom layer suddenly started to fly around, wasting a lot of my precious time, materials, and money.
2. The dimensions and quality of the printed parts did not meet my expectations.
3. The bearings would run around in the middle. As the bottom structure of the box, I wanted to be able to put the plate in place at once without having to manually adjust the rollers, because I couldn't see it.
4. I wanted my filaments to be as close to the bottom as possible without taking up too much space in the box.
Therefore, I decided to create a new model myself.
First, its size had to be small enough, and it absolutely couldn't fail to print, because my filament and time are very expensive, so I added a large bottom layer to it.
Second, its bearings shouldn't run around, so I constrained them at both ends. Finally, I added new modular notches to both ends, so that once my box arrives, I can continue printing its frame according to the dimensions.
I believe this model is suitable for friends who, like me, need a simple, compact, small-sized model that avoids wasting filament and has extremely high stability. I will post a complete photo of the filament desiccant box for everyone's reference once my box arrives.
If you have better suggestions, please feel free to modify my model. Thank you.