One note about the Jobo tank lids; for C41 processing where one expects some expansion from the tank the red lids are designed to be pushed, or popped, inwards before being put on the tank. The gas produced during processing then pops the centre of the lid back out again whether using rotation or inversion agitation.

For the Paterson System-4 tanks with the one-piece "Tupperware" style lid I just fart the lid, in the same way that one does during putting it on initially, except in between the inversions. In that way the pressure is prevented from building up, note that nitrile gloves are a good idea for this as there can be splashes depending on the pressure released.