max! i find now that i moved up to a glock 26 subcompact i rarely get mad! on to the springs. everything you read is subjective. the tire pressure, the sidewall height, the wear on old pads or the actual thickness of the new pads, the wear of the older springs if they are to be cut will all effect the overall height drop. if theres a 1 mm difference in the actual pads , springs and tire height along with the wear on all the reamining suspension parts you could see a difference of maybe 4 to 5 mm. thats why you figure as close as you can to what you want with the coils and then fine tune with the pads. in the end its trial and error. if you need the spring compressor you can use mine