Center car seat tablet support link

Link two tablet supports to have a single one in the center, so the kids or passengers can watch the same shows. Can be used between the back or front seats.

It's only compatible with supports that use a swivel ball joint. Files are included for three ball dimensions I found to be most common (16.5mm, 17mm, 17.5mm). Two lengths are also included (18cm and 21cm). This doesn't need to fit perfectly if supports have additional joints. Corresponding size nuts also need to be printed.

Safety note: Tablets can be dangerous in a car. Make sure to print with a durable material, resistant to sunlight and heat (such as ASA), and use enough infill and walls (ex. 40% and 4).