My lid is completely removable, as I do not use the hinges. I have two handles on either side of the 3" lid. I usually start a firing with the lid off completely. However, this is not really needed. The only two things you have to worry about are your rate of temp climb, and the vapors the kiln will produce from your ware. The vapors are of three types, the moisture being first to leave from the atmospheric water and the chemical water inherent in the clay. Atmospheric water is water that is in the room or atmosphere. Your pots will not dry further than the air moisture. Chemical water is the water that is part of the clay formula itself bound at molecular levels.
One of the other two vapors come from organic materials that burn out from the clay-bacteria, plant materials etc. These are usually gone be 600F. Then the last of the vapors come from chemicals in the clay changing, these will include sulfur products, and others. These usually are gone by 1100F.
Rate of climb in temp is usually recommended to be slow up to 1100F. due to the vapors and one final chemical anomaly. Quartz has a physical change(inversion) from alpha quartz to beta quartz. This change can be problematic for ware if going through the inversion often causing cracking.
This information is meant to give you some background as to why to fire slowly up to 1100F, and then allow a faster climb. At the same time it should illustrate that opening the kiln after reaching temp is . . . . disastrous. Above 1100F, and anywhere above 100F.