About this 3D model

Here is a basic filament holder and dust remover combo. I designed it to fit on top of my Aluminum Mendel, but it could be attached to virtually any printer (especially ones with aluminum extrusions). I cut a basic sponge to size and then poked a hole in it that lined up with the hole in the part. The filament runs smoothly through the sponge and filament guide hole. After a few test runs it seems to be doing its job, but I would love to hear your feedback. UPDATE: I noticed that the sponge was moving a little bit while printing and it was also getting dried out faster than what I anticipated. So I designed this lid to keep everything from moving and to also keep the moisture in the sponge for a longer period of time.