Welcome
There are a couple of other projects, I don't know whether you are aware:
https://git.exherbo.org/summer/packages/app-admin/66-exherbo/index.html
https://gitlab.exherbo.org/exherbo-misc/66-exherbo/issues/1
https://git.devuan.org/66-devuan/66
Exherbo is a gentoo fork and devuan is devuan :)
This 66 thing is picking up some steam!