I see that the inner FOB and battery are about 1/3 the height of the actual plastic fob. The buttons are tall to mimic the car shape and just overall design makes it much thicker than required. I have searched for alternative cases that would be slimmer or half the height maybe but have seen nothing. I wish our cars could use bluetooth like the 3/Y family. Respectfully not looking for 'why do you want it thinner' responses but I am sure they will come. Anybody tried 3d printing something?