Plug for hole in Chitu E1 filament dryer box

These little plugs close the two small holes on top of the rear side of the Chitu systems Filapartner E1. There are four more rectangular holes on the bottom. I added a plug for them, too.

Update 2025_10_03:
Released revision V2 that fits even better. There are now two versions. 
V2 normal:  Standard  size, will be best for most of us.
V2 smaller: Smaller size, for those that find the normal one too big. 
The size of the Text plate is different, the plug size stays the same.

These little holes seam to have no function and are not mentioned in the manual, but in fact they are ment to be used with the installed default grey silicone plugs that have a little additional squishy pin on the side of the latch that is ment to go into these holes. But it’s almost impossible to do it like this. This impossibility results in a hole the breaks the airtight sealing purpose of the box. 

If you want to close these holes to avoid moisture from creeping into the dry box these plugs will do the job. They fit tightly and snap into place but can be removed easily. 
 

I recommend printing the plug in PETG because PLA may be to brittle. Most of you will have some left over PETG. You need only a few grams for these. You need two plugs  for each Chitu box.  

I recommend printing with a 0.25mm nozzle because the fine details of the imprinted text and the center pin will not come out good enough with bigger nozzles! 

 

As a Bonus I added a plug for the four hidden holes on the bottom of the box. Makes the box a bit more airtight. Print them with PETG and 0,4mm Nozzle (0,2mm layer height).

Advice:
Even when sealing the Chitu box a bit more with these plugs the Chitu box is not airtight enough for longer storage. It is airtight enough, especially with desiccant added, to serve as a dry box and dust protection during the process of printing with enclosed filament. 

For longterm storage moisture will find a way inside, as there is no sufficient sealing between the lid and the mainboddy of the Chitu box. 

For Filament storage there are better options than the Chitu box:
1) Store Spool in vacuum bag with desiccant. Thats best for very long time storage.

2) Use transparent, round food boxes with added desiccant 

3) Use the polydryer Dry boxes, that are sealed very well and can house quite some desiccant and can serve as Dry Box for printing aswell! Thats what I use for often used filaments.   

Please show me your printing results and send me fotos of your makes. I like to see how you use this model. If you have ideas for improvement don’t hesitate to send them to me in the comments.   I will try to incorporate your suggestions and will modify the model for special needs if you ask me to do so. 

And of course a like ♥ or a rating ⭐ of the design are always welcome. 

happy printing, 
clamikra