I found a little software that helped me think with our Pimax 4k :grimaçante:
https://www.youtube.com/watch?v=enxMLgp6MMI
http://www.mediafire.com/convkey/f111/cvu3mtdqr8ud6486g.jpg?size_id=5
However a tuto to use it at best would not be refusal :Miam: