These work well for internal windows if they are quiet clean https://www.youtube.com/watch?v=A71lmCMyXxg
Quote from: mark m on March 23, 2015, 11:07:26 pmThese work well for internal windows if they are quiet clean https://www.youtube.com/watch?v=A71lmCMyXxgThat's interesting and to me a great idea but how the heck do you make one?