After initial filling the cockpit lines were full. After a half hour had past, bubbles appeared in the lines; the system was bled again. A leak was discovered at the left caliper; one fitting was tightened. Testing the brakes in the cockpit exposed a significiant leak coming from the right gear tower. Inspection revealed that the AN elbow fitting connected to the gear leg was leaking at the leg threads. Worst possible scenario. The brake system was drained, the line to the leaking fitting was disconnected and research on solutions began.