Here is my compo entry worklog (to be named). I'll save you from reading a long list of features that probably won't get finished so I'll just get right into the real progress. Hacked up a 5" VGA Dalian driver board. It now uses ~1.82 watts powered from 5v. I was able to compare the efficiency of the onboard 5v regulator which is about 90% efficient stepping down from 7v, interesting. The driverboard plus components is less than 3mm thin which will come in handy. I am still early in the design phase and testing various joysticks. The PSVita sticks look equivalent to the RKJY sticks with rubber caps on them, not bad. They are rated for 5v but seem to work on 3.3v too. NSwitch Joysticks are also on my hit list to test soon. My backup plan is to use 3DS sliders.