As the design engineer consultant for this project, Miro overcame a number of engineering challenges in order to create the beta model. These challenges included developing a modular design for the micro-fluidic test cartridge, allowing for easy user access, and providing the ability to use a shared optical detector to read a real-time polymerase chain reaction in each cartridge.

In addition, the goal was to develop a strong internal mechanical structure that would allow easy access for user maintenance and manufacturing assembly. Special care was required to provide a smooth action on the cartridge drawer and a positive connection for attached electronics and fluidic connections, such that the four modules could be easily removed and swapped out in field during service.