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Dear team Moz, I'm investigating SEO issues for the site that dropped rankings over a period of 4-6 months;  after conversion from old platform (xenForo) to new custom developed platform. The old version of the site was a simple xenForo based forum; with threads having standard url structure as like www.domain.com/threads/thread-title.{thread_id}/. Notice the trailing slash. We chose to keep the URLs intact during conversion to new platform; however the site still lost rankings. I'm sure there could be multiple reasons for it - but I wish to know if I should adjust the URLs - 1. By 301 redirecting all the URLs with trailing / to the URLs without /. 2. Leave the URLs as they were. I must also mention that the new site has several new sections; and the old forum is just one part of it. The rest of the site follows URLs without trailing / - as it's the recommended URL structure by Google. I'd really appreciate your suggestions on this.