Antwoord op "which seals / o-rings usually cause coffee leaks during brewing?"Soggy pucks are usually caused by to coarse a grind. Some times the coffee grounds fall into the boiler valve recess especially when the pucks are not solid and plug the small hole at the bottom of the recess that allows drainage into drip tray. You will see boiler valve in recess behind the brew group when you remove the brew group. Beige plastic piece with O-rings. Stick your finger into space beneath there should be no grounds sludge etc. Clean out hole with toothpick and water spray bottle until ware flows freely into drip tray.
Antwoord op "Anyone familiar with Saeco super auto espresso machines?"There is a floating magnet inside the water tank. Sometime becomes waterlogged. Can be replaced easily or you can take the cover off and disable by splicing the wires together on magnetic switch then you have to be careful about keeping water level up.