1. If you want the new MP40 to have the same settings and schedule as one of your existing MP40's, you can simply copy the config to the new pump. On the MP40's configuration screen, click the Copy icon at the upper right and then select which MP40 to copy from.
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2. Go into the Advanced tab on the new MP40 and add this line:
If FeedA 000 Then OFF
(substitute FeedA with FeedB, FeedC, or FeedD depending on which one you use, and substitute 000 with the number of extra minutes you want the pump off after the Feed timer expires.