Guest: Darren Charrier. Topics: Darren's SEDS projects for a 3D printed engine, lunar lander, 6U cubesat communications unit, HE3 lunar mining & more. Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com. Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use.