I can't find that post.If you are asking what changes or updates were made in the 386.7_1 test builds I think RMerlin explained it in the following post earlier in the thread:
Release - Asuswrt-Merlin 386.7 is now available for all models
Are the changes significant enough to either stay on the original or the test version for IPV6 purposes? Up to you. This also contains fixes for DNSFilter in IPv6 mode, and the dropbear PATH not being properly set by some SSH clients. merlin@ubuntu-dev:~/amng$ git log --oneline 386.7..HEAD...www.snbforums.com