Hi all, because some friends and me were not that satisfied with the market of portable vaporizers, I decided to build my own. The main goals were as follows: Convection based - fast and high efficiency Made out of trustworthy materials (wood, glass, metal - no plastic in the heat path Chargeable via Micro-USB Integrated battery should last several sessions Cheap (less than 20$ worth of materials) It uses a push-button to activate the heatup. When the light changes from red to green, the chamber has reached the programmed temperature and you can draw while holding the button (somewhat similar to grasshopper). It lasts 3-5 sessions. This is the current prototype: Currently I'm building some more prototypes for my friends for testing, but I am a little bit lost on how to continue with the project. I am not quite confident that I can sell it as a product. There has to be more time spent for fixing bugs and simplifying the build process. Because of that, I also am thinking about going open source... What do you think?