it worked perfectly! I used anycubic photon mono. Thanks for your help.

Hi dimi1game how are you? Yes, I have already printed it several times because I also sell the physical model. I don't understand the situation of the stem you are referring to, maybe the problem is the calibration on your slicing software? The "small walls" are used for distortions in printers that do not have a correct exposure time regardless of the type of resin, thus ensuring the integrity of the piece, which can be removed later with pliers or sandpaper... There was no type of feedback so far about problems with this model, and I even use it on my own keyboard. Could you forward me your printer model and settings used so I can check the situation? Thanks in advance.

have you print this ? the stem is too loose ... and what are the small walls for on the end ? can you please use a normal stem ?