By selling few our of prototype units we got both meaningful feedback and evangelists (not consumer, as the thing itself is mostly useful for government institu

By selling few our of prototype units we got both meaningful feedback and evangelists (not consumer, as the thing itself is mostly useful for government institutions). On the other hand we also got interesting support headaches, as the final production version includes all the feedback and thus is completely different in overall architecture, hardware and software and thus probably only thing that is compatible are pinouts of I/O connectors (and voltage levels on them are only mostly compatible).