There are only two iron plates in the 4C box. These are usually broken when removed from the screen. It would be great if you would either develop a reusable solution or sell iron plates as spare parts.
It’s ironic that the lack of a 7 cent component stops you from using the 4C.
Hi @chrisschaefer thanks for your feedback. We are constantly working on improving the user experience which includes more efficient ways to mount our eye trackers so will gladly pass along your comments to the relevant team. If you are in need of extra iron plates, please get in touch with Tobii Tech Support directly @ https://help.tobii.com/hc/en-us/requests/new and they should be able to help you out in this regard.