Secondary mirror holder with silicone glue holes

These holes are designed for applying small blobs of aquarium silicone, providing a flexible, stable, and stress-free way to secure the mirror. ⚠ Notice: When using PETG or other filaments with low surface energy (such as PC), silicone adhesion can be reduced. To improve bonding, lightly roughen the contact surface or apply a suitable primer. ABS and ASA generally bond well with silicone, while PLA also gives good adhesion but is not appropriate for exterior. My own print was made in PC-CF . Despite the lower adhesion of PC, the conical shape of the holes ensures the silicone blobs hold securely in place. Thanks to La3emedimension for the original design :-)