There is usually a fair amount of interest in proprietary and aftermarket upgrades 3D printers. I'd like to see a list of requests for items and RoBo 3D responses. Below are some common upgrades I've seen across other printer platforms. Replacement and optional size hot ends. Replacement and optional extruders - such as dual. Replacement and optional printing platforms - for filaments besides PLA and ABS. Utility upgrades - better rods, bearings, gearing, motors. Usability upgrades - such as lighting, LCD, SD card port, wireless. I hope that RoBo 3D will see this as an opportunity as well as a challenge. They are making an excellent printer platform. Next, they should try to make it as adaptable as possible to allow it to become individualized for as many people's needs and requirements as possible.