presentation pen 3d model

“Design a 3D-printable, multifunctional refillable presenter marker with integrated laser pointer and presentation controls. The device is cylindrical, ergonomic, and modular, with approximate dimensions of 170 mm height and 20 mm diameter. The model must be split into printable parts: 1. Outer body shell (2-part: front and back snap-fit or screw-fit enclosure) 2. Removable cap 3. Internal cartridge holder for refillable Pentel-style marker ink 4. Electronic housing compartments (battery, PCB, laser module) 5. Button caps (power, laser, presentation, volume) **Key design requirements:** * Include internal mounts for a small Li-ion battery (e.g., 18650 or smaller), PCB, and laser diode module * Add a front opening for the marker tip and rear/side opening for laser output * Provide a magnetic USB charging port slot on the body * Integrate tactile button cutouts aligned with internal switches * Include snap-fit joints or M2 screw holes for assembly * Ensure separate sealed chamber for