Hi Alvin, nice house and reno, BTW, your sliding door gap looks big, please check mine, http://img59.imageshack.us/img59/2005/kitchen09js.jpg, http://img137.imageshack.us/img137/1918/mbr0od.jpg. My contractor actually build something to hide it (cover it) the mechanism and also from your picture, you should get rubber trimming on the top & bottom, so aircon will not be running thru.