Production and assembly of a prototype board / Production of the mechanical parts
Open questions from INCAA
You mention a prototype board. What is the number of boards you are interested in. The SPEXI prototype series was for example three. The unfortunate side effect of such a small series is the rise of the cost of the PCBs and assembly of the board, but three is better than only one.
Also: when having more than one proto, testing can be done in parallel at CERN and here at INCAA. And damaging a board or a not functioning board is less a problem when there are more boards available. Therefor we prefer at least three boards.