As far as i know this board is manufactured by some kind of cooperative between 3 people or companies and only one guy knows the knowhow. they woudnt bend on price even on the whole lot of 500board they had on stock.
Neither they would hear me about what we need . Basically i told my agent to tell them to sod off and then sell them one by one as they do now.
I know of other similar boards that only have file size limitation and are more willing to cooperate. But honestly dealing with Chinese is extremely tiring when you want to achieve a real deal or development.

This is a nice board for 150euro but thats it. nothing more.