I love this project. In high school I started a group in my school district to collect or buy the remotes and install these in teacher's classrooms. We installed over 200 of them! Back then there was a healthy community online of people porting the software and building and selling the infrared pens. I learned to solder for the first time turning dollar store plastic pointers into infrared pens. The best setup was to use a 3D printed clip to mount the remote to the drop ceilings in the classrooms- this made it more difficult for a student or teacher to obstruct the camera while using the board and made it harder for someone to accidentally knock the remote which would then require the teacher to recalibrate (a process involving tapping targets at the boundaries of the projected screen).