Designed this mount for my Air Cruiser RTT. It sits above the central frame tube and is easily removed when not in use. As much as I love doing outdoorsy stuff when outdoors, there are times (night mostly) where you just want to kick back and unwind with some Netflix.
Aside from printing the mount, you'll need the following parts to assemble:
Print in the orientation provided, with a brim, and tree supports. This will ensure the best surface finish.