Anyone have a 12.9 keyboard, or maybe the 9.7, where some keys, or just the space key, is stiff enough you keep failing to activate it while typing? The letter keys require almost zero effort, which you want with such low travel keys, but then the space key requires 2-3 times the pressure. I keep failing to move it while typing since I get use to the feeling of the other keys. To consciously press harder slows things down and or feels uncomfortable. I'm going to check a store soon, but how's everyone else's experience?