It can go lower :-) the rears have another 10psi or so left in them in that last pic. But I could do with shorter shocks tbh. My rear wheels will never go under the arch though because of my offset. Any lower and the freshly painted arch will bang on the lip of the wheel.
The fronts have 20psi left in them in the last pic, the tyres disappear and sit up in the arch, I need to get a proper picture done, all my pictures are of it parked up and spur of the moment!