Hey guys, I have a domain registered at May 2010 and it got sandboxed since the beginning of Sep 2010, I continued to build backlinks using article submissions like UAW for more 2 months after that but it didn't recover so I just left it there, and it's still sandboxed. Recently I have accquired a aged pr domain with many backlinks. Which of the following will be the best option? 1. Start to build backlinks to the sandbox domain again 2. sandboxed domain 301->aged domain and build backlink to aged domain 3. aged domain 301->sandboxed domain and build backlinks to sandboxed domain 4. Other better options that I don't know... Thanks in advance and any help will be greatly appreciated!