RTI provides complete design and manufacturing services for custom change kits, including the sockets, soak trays, dump trays, shuttle interfaces, DUT boards, and tester interfaces for auto handlers. We have designed unique interfaces including using a common universal DUT board and tester interface for a family of optical devices. RTI developed a unique solution for testing a family of optical devices consisting of both QFP and QFN package types. The test system and handler required the devices to be tested dead bug (package pads facing up). A universal mother board (tester interface) was designed by RTI that permitted each device in the family to use only four unique assemblies (Work Press Assembly, Socket Base Assembly, Soak Boat, and Dump Tray). This substantially reduced costs of the change kits and reduced the change over time between the device types.