Me too. 1 bar, any 4 line kite normal simple kite. I like those overbeefed lines on the fronts. It makes me feel safe. Plus it helps my kite drift in the waves.
You can use any 4 line bar you want on a C4 provided you make the end connectors right and also tune the lines to the right length. At full power with all lines tied to something equally, your bar should be about a couple of inches shy of touching your chicken loop.