Mirror Minecraft Chisel & Bits?

Hi, I would like to have this structure, built with the Mod Chisel & Bits, mirrored on the flat side. Since it was quite complex, I can't just build it on the other side. I have the Mod Worldedit, which doesn't recognize the bits as blocks and just copies them normally.

I hope it came across what I wanted to ask.

It's best to give yourself a structure block with: / give @s structure_block

Then you mark the whole thing, save it and insert it. Then mirror when pasting.

Then I have to read this construction block first. I've never used it