Great design, printed the outer case in matte black PETG and the inner case in matte green pla. Fit perfectly for 49mm cpl filter and for 49mm variable ND filter need to use 52mm filter slot for perfect fit. Modified slightly to fill up the side and middle wall without bambu logo. And I do not have 6x2mm magnet, modified the slot to fit 4x2mm from cyberbrick. Added 3mm foam on top, the filter fit snugly inside the case.