Hi, I never needed a stair gate for my child so am a bit clueless, but just had to buy one for a house I rent out on airbnb. I wanted one that could be put in and taken away easily, depending on who was staying. I bought a 'pressure fit' one (Safety 1st). The person who installed it (there was a tiny bit of assembly) has drilled it into the wall as per the photos. Can it now be removed or is it permanent? I just wondered if anyone else had the same stair gate as I'm not there to physically wrestle with it, thanks to anyone who can be bothered to answer:)