I had to dual lock on the top of the side wall, as well as the side of the wall. That seemed to do the trick. But, also, I don't have the plane hanging on the line at the top, except when we're working with it. From: First Lego League in Virginia and DC [mailto:[log in to unmask]] On Behalf Of Sonya Shaver Sent: Monday, September 09, 2013 3:24 PM To: [log in to unmask] Subject: Re: [VADCFLL-L] Problem getting the zip line tower to stay put We have really not had any issue with ours staying in place. We used dual-lock, and ours seems to be holding up. Sonya Shaver _____ To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to subscribe. -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-ANNOUNCEMENTS-l.html to subscribe.