I have used the Gorilla support arm and the Pine Ridge Archery arm. They both work well. I like thee Pine Ridge Arm better because it has a detachable base. I can set the base up ahead of time and just bring the arm out when I go to the tree. Much quicker and quieter that way. Plus I set up bases in my other 3 stands as well.

You can get it at Cabelas:
[link]http://cabelas.com/cabelas/en/templates/pod/horizontal-pod.jsp?_DARGS=/cabelas/en/common/catalog/pod-link.jsp_A&_DAV=search&id=0021126&navCount=1&paren tId=&returnPage=search-results1.jsp&navAction=jump&returnQueryString=id%3 D0021126416015a%26type%3Dproduct%26cmCat%3Dsearch% 26returnPage%3Dsearch-results1.jsp%26QueryText%3Dpine%2Bridge%2Barchery% 26N%3D4887%26Ntk%3DProducts%26Ntx%3Dmode%2Bmatchal l%26Nty%3D1%26Ntt%3Dpine%2Bridge%2Barchery%26noIma ge%3D0&link=&parentType=&indexId=cat420016&rid=[/link]

Best of luck.