Aperture Science Logo Keychain fixed

I made this remix because the original had parts between the letters that did not stick to the actual keychain, making them useless. I simply added some walls to connect them where necessary, so now your aperture logo will not have void space in the letters! 

I personally printed with four walls, since I put it on my backpack which gets thrown around a lot. Probably doesn't need more than two in most use cases.