UPDATE: Added a small cylinder to join two of the clamps, this allows the polished plastic materials to be printed without violating the minimum bounding box rules. The two small adjustment button actuators also have the same type of connection. This is a mounting plate for the DNA20/30 and Micro-USB charging board from Evolv. This is the complete set in one group. This limits you to a single material but it is the least expensive option. This includes the Mounting Plate with USB, 3 - Button Actuators and all of the required clamps. The required case opening is 22 millimeters by 80.6 millimeters. This will NOT fit the 1590A but will work well on the 1590B. You will need 8 - 1/4" Torx Thread Forming Screws for Plastics from McMaster-Carr to secure the electronics to the plate. You will also need a T3 Torx Driver if you don't already have one.