print with 4 walls and 25% infill
if your printer isn't calibrated great increase size by 0.5-1.0% as i have made the ecas fitting ports tight intentionally so they are a press fit
requires 5 ecas fittings
i have also added mounting holes that take m3 5mm(L) 4mm(W) knurl nuts
The author marked this model as their own original creation.