Problem with "back" pump setup for tidal swell mode

[gobble]

I just purchased a 3rd MP40 to add the "back" pump functionality in tidal swell mode. Problem is my tank is only 2" from the back wall and the dry side is 2.5" deep. Won't work. An MP10 would barely fit but the back glass is 1/2" thick.

Is there a location I can see the "back" programming to duplicate it with settings on something like the AI Nero 5 pump that would fit on my back wall?