I would set up an interrogation of the police officer to ask him questions concerning many of the unknown issues. Its likely the only way to get the SMD model information.

Or you can simply argue that his statement is so poor that for reasons x,y,z that you cannot determine if the speed was correctly determined.

I would ask to interrogate the police officer and ask him ? about his training before trial .. you have a right to conduct an investigation beyond just discovery ... so why not exercise this right?? I they refuse to cooperate, they leave them open for a dismissal due to a violation of court rules.