Downgrade 10.6 with hardmod

Hi everyone, I have one question because I cant find solution for this.
I want downgrade my 3DS from 10.6, but its patched and menuhax doesn't work. So I wanted downgrade via hardmod, and now Im read that after patch my dumped nand, the menuhax still dont work and I must have ocarina/cubic ninja. The question is:
Is that true? I cant use menuhax when downgrading via hardmod?

Sorry for my bad english and thanks for help.