I have tried UCS for three days only, this is brilliant, thank you for releasing it.
Once calibrated, I have a small issue with the effector not going low enough to catch the card, I have tried several times to recalibrate and everytime it will be about 1 cm too high, I just added a thin book to compensate and it's working fine. Maybe adding an offset could help (or just being able to add a negative offset when creating an object).
So far, this is a great piece of software. I am going to run some test with the gripper instead of the pump.