First, call PerfectPass. Their customer service and experience are great.
I don't have any of my numbers here and the boat is far away but I have some different kdw settings for different programs, like surf or boarding. Mine keeps very accurate speed in every setup I have including around corners and with different weights. Allways within .7 but usually.5 or less variation.
The only time I've had issues are when I have satellite signals blocked.
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