My first homebrew was a D-390 also. It has become my least favorite camera and I will never build another using that model. The flash is extremely weak and the response time is 5 - 6 seconds allowing game to move completely through the frame before the camera even triggers. If you have the soldering skills to hack a D-390, you have the skills to modify a Sony P32 or P41 and will end up with a much better gamecam for just a little more cost.