CIS-2014 in Minsk.

Actually, how complex is the issue of implementing mirrors in the HD mod? Maybe it's worth somehow motivating Baratortch to work on this?

I think this issue is not as simple as it seems at first glance, and you definitely can't implement mirrors in 5 minutes. Not to mention that you need to fix the bug with the underground territory first. And Baratortch has made it clear that he doesn't have much time to develop the mod, so it's unlikely that we should expect this anytime soon.

Regarding the versions, I agree with PReDS. All templates are on SOD, and the mirror is on VT, and without XL+U.