I've made a decision to purchase DD Maze4-1. But, I am not sure whether the cold plate , water block and the peltier are already assmebled before shipping to the consumer. It seems by looking at their website that those parts have to be combined together by the users themselves. If this is the case, what is the optimal pressure on the peltier by scrolling the six hex screws with the water block? Is there any indications to tell me that the pressure is right?