I like bubbers' solution. Sometimes that is the most expeditious.
So many aircraft in the fleet have balls not leveled properly that I have relegated to using the ball for an engine-out and the heading for rudder trim. I have only worked one place where MX has leveled the slip/skid indicator properly on both sides.
Only use the ball if you can confirm center with wings level (autopilot off) and no heading change. Nice to recheck trim as fuel burns off on a long flight.