Hi Guys,
Do not over inflate your kites. Inflate to the manufacturers recommended figure and don't go beyond. A kite that needs more than recommended pressure to maintain structural integrity is poorly designed. There are a couple of brands come to mind that pucker their wingtips due to design, they tend to need P-Lines.
Here is a couple of things to keep in mind:
1/ When you are pumping, you are compressing air, which creates heat. The hot air inside the LE will cool. As gas cools it contracts.
2/ When you leave a kite inflated on a hot beach, the air in the LE expands and increases pressure.
3/ When you crash your kite in the water on a cool day and then relaunch it, you get an airconditioning effect as the water in the fabric evaporates in the wind. This cools the air and contracts effecting the pressure.
4/ The gauge that comes with most kites retails at about 8 dollars, that means it probably costs about $1 to manufacture in China. They're not that accurate! Learn to feel what the pressure in your leading edge feels like when correctly inflated and stick to the feel/squeeze method to back up your gauge.
This is why you only inflate to manufacturers recommended pressures, it should allow for all of these extremes. Cheaper kites can be destroyed by over inflating. DON'T pump your kite up "To the MAX"

DM