Sorry to bring the thread back on topic...
What would be considered "enough"?
Is it the binaries, the source or replacement parts?
He might feel that source and schematics could raise up a competitor.
Binary files or selling pre-programmed parts might be a better angle if you just want your existing cards up and running.
You might also consider a bounty proposal to reimburse him on his investment.
I don't feel confident that an unfocused "give us everything for free" approach is going to get very far.