Here's the Pi NoIR enclosure which I just designed. It's printing now, in white PLA. I bought several of these medium-sized suction cups at Ace Hardware UPC 037063013418. The back of the enclosure is supposed to fit on the suction cup to hold it to the inside blue plastic on the left side of the Robot C2. I'm thinking that I probably shouldn't have used 100% infill since it's thicker than I remember.