Just sharing with you a cosmetic idea. in my new BLV ender 3 Pro project, I decided to install the Mellow's transparent BMG Dual drive extruder. Then, wondered what will happen if I will add a few LEDs. So, i installed a small LED strip (3 leds). and i think It made the extruder even more awesome
Link to Mellow Transparent BMG Dual Drive extruder.