I used
Aquanic 3000, Dyna 3000, Eh 1262 and
Eh1260 on 4 identical OHF setup , all with 40mm x 2 holes customed discharge outlet on the 2" height Base Plase.
Notice the below OHF base plate the water level
Aquanic 3000 it is much lower at 60%.
Dyna 3000 , Water level 75% to the base of the OHF boxes.
Eh 1260, Water Level 80-90% of the Base plate
Eh 1262 Water Level Already 95%
The Water level raise that high also because the discharge adapter screw thread... Thus Aquanic 3000 fare much lower in term of headloss, as it is powering up a 5x2x1.5, where as Dyna 3000 is powering up a 5x2x2 . Both OHF are the same 4 Tier.