DSI Comet-1 One Sheet DSI Comet-1 One Sheet from Jeff Valentine DSI Comet-1 One Sheet Designed and built the layout of this 2-sided sales one sheet for both models of the innovative Comet-1 water thruster by Deep Space Industries. gLike DSI Comet-1 One Sheet Designed and built the layout of this 2-sided sales one sheet for both models of the innovative Comet-1 water thruster by Deep Space Industries. Creative Direction Art Direction Copywriting & Editing Share R 7 n Available Jeff Valentine Texas Ad Man TX Follow Contact