Problem with symmetry

[system]

Hi I’m new :).

I have problem with symmetry.
I try smart resym, s pivot, unify and all failed.

I find this:

"tool.deformations.smart resym

If that doesn’t do the trick you’ll want to break your model in half, mirror it and weld it back together."

but I don’t know how I do it becouse my model is on sdiv6.

[beta_channel]

step down to subD level 1.
set up different polygroups.
split the polygroups into 2 different tools
delete 1 of the subtools.
Set sym line to be dead center in the world
mirror the tool
merge them together.