So after I restructure the top and see what leaves are coming back or not. For branch removel etc. Could The rock to right be tied to roots and repotted for couple years to accentuate what it has already? Would u do that?

Nope.

Why?

Better question probably is: why do you think that makes sense ?

Because there is no reason for doing that, and it won't look good, unless you leave it in the ground for a decade for it to grow roots that merge with the rock. But then you are better of taking a cutting and training that as a root over rock.

OK.

I saw a video were a dude wrapped a rock with roots buried it for two years had awesome root . knarly .than supposedly he did it again.

OK. A few things . the dawn redwood Forrest is awesome . I will work on ramafacation over the years.not too many out there....also.. Have a proper room with vents .etc to not keep the room below 20°andbabove 40°f for roots and dormancy.! Taking this serious . green room too come. This room is for my juniper Nana's Chinese elms , Shimpakus ligustrum and dawn redwood and bald cypress maple seeds germanating. Question is. Since dawn redwood is not as hahardy conytaversley as the bald cypress but similar could you graft the D.R.too a B.C. to cold hardy it to drop from zone 5too4????? Hahajahahja

My black pines white pines grafted/ blue spruce and lodge pole pine wild / will ask questions in few years. When needtoknow

Yea zone 4 I'm one of the coldest places in the nation should be zone 2