Unattenuated JAMMA video can be harvested right off the pins on the back of the edge connector with solder wires terminated to some connector. Useful for us test bench users that will use this for testing/calibrating 15khz CRT monitors. Also, if you do end up adding trimmer pots, turning the pots all the way down might allow us to harvest such a signal through the mini DIN 8 connector.
But since we are on the subject of adding features, a 5-position JST NH header somewhere for unattenuated RGB, Sync, and VGnd would be a very nice nod to the test bench users.