A winter storm of 30 knots from the north knocked The Sentinels over. The entire huge cement block over! The top head pieces smashed on the patio. :( So...lessons learned...dig in for security and a flat surface mounted high with heavy wind provides amazing leverage.
Continuing with the recycling theme, I incorporated found glass mosaic to top the sculpture and it's withstood everything since then. :) I still love it - even its morphed state.
I'm perfecting ways to do the disks angled and will be putting together a few more smaller versions to have available for sale,