Hi I got expired domain few days ago and that domain have some high quality links that impossible to me get it easy . I done 301 redirect to my new money site . the problem that domain are on completely different niche like you said Science>>Fitness . most of anchor links use domain name e.g steven.com and the anchor is steven because domain was more bio like then niche like . now could I benefit from this old links .and it's OK to make new backlinks using my niche anchor on that R301 domain .