Previously explored 'new' working point (0.578, 0.542) may put the tunes too close together for optimal operation, or may not be optimal in other respects. Test three new working points by running a frequency map analysis on each point:

• (0.564, 0.537) -- in same region as first 'new' working point
• (0.588, 0.542)
• (0.625, 0.542)

Working Point: (0.564, 0.537)

Working Point: (0.588, 0.542)

Working Point: (0.625, 0.542)