Thanks Peter for putting time and effort in helping a beginner
The D31A relay I had found before in fritzing app and even used that in my complete Thermostat design. Until I printed it the first time and tried to match components, then it was clear it had the wrong size and pin layout.
Exactly as your PCB image above shows the D31A is bigger, and that is what I see when printing as well and trying to fit a real HE721 to it, scale is off.
Maybe I'm doing something wrong (since I'm learning as I go along), but I guess the printed pcb needs to fit a real component for it to make sense?
On a printed paper with HE721 relay on top.