Credit: Kaitlyn Cimino / Android AuthorityTL;DRGoogle has released official instructions and 2D CAD drawings for creating custom Fitbit Air bands.The company’s guidelines cover everything from sensor placement and attachment force to safe skin-contact materials.The files make it surprisingly easy for makers and 3D printing enthusiasts to design their own Fitbit Air accessories.Google has designed the new Fitbit Air to be one of its most accessible fitness trackers, and keeping with that spirit, the company has now released instructions and 2D CAD drawings of the wearable to help third-party brands and creators design their own bands for it.