I have an old site that has a lot of good backlinks. I have abandoned that project and want to get into a new niche. I want to buy a new domain and 301 redirect the old domain to the new one. Here is the thing, I want to do this on a trial basis. If I am not happy with the result, I want to turn off the 301 redirect to the new site, and 301 redirect the old site to another site that I have. However, on another thread I read that 301 redirect can be done only once so the above will not work. Is this true?