methadone taper to a stop

I have been on methadone for four years for pain management and recently I have decided to taper myself down to nothing.
My question is this, like currently I am down to 4mg and my neurologist suggested even going down to 1mg to nothing.
What will the withdrawal symptoms be on 1mg is my question. Surely it can't be as bad as it was when I tried to quit cold turkey from 20mg.
Dunno, I appreciate any input or experience with this!!