To be honest when Sparkles quit methadone
she did it in a similar way to the OP, although not as quickly.
She was on 150 mls.
She reduced her dose by 10mls a week until she was down to about 70-80 mls.
When she got to 70-80 mls, she reduced by 5 mls every 4-7 days, depending on how comfortable she felt until she got to 50ml.
Then she reduced quite quickly, by 5mls ever 4-5 days until she got to 30 mls.
She stayed on this dose for 7 days then went for three days on nothing, then made the jump to bupe.
She was on 32 mg and reduced by 2mg per week, until the last 2 mg, which she stayed on for 2 weeks, then she stopped.
To be honest it wasn't as bad as quitting methadone alone. It was much more comfortable.
She does think a quicker, rather than a longer drawn out reduction, worked better for her. She needed to feel she was moving forward, not stuck at one specific dose.
She was studying at college from September (when she began her reduction) until the following September (when she'd quit) having something to focus on, a goal, took her mind off how uncomfortable she felt at times.
But she also found the fear of quitting far worse than actually doing it.
She also had lots of support, so if she was ever wavering, she had lots of people to give her positive re-enforcement, point out how well she'd done.
That was extremely important for her.
Sometimes we look for things to stress over, after all, if life is tough, it gives us an excuse to use.
Not saying the OP is doing this, but Sparkles knew she used drugs
to alter her moods, and any excuse was good enough.
Just be aware of that.
The other thing that reduced the fear around quitting was she reduced her dose a week before her doctor was due to review her reduction. Knowing that she could cope with the amount her doctor was cutting her down by made her feel less scared.
At one point she did stay on the same dose for an extra week, she knew she wasn't ready to reduce that week.
Also by doing it this way her reduction was in her own hands, she was in control, that empowered her a lot.
Remember, you've done awesomely well to get this far. Just wait and see how it goes.
Quitting drugs is so personal to everyone, you may find that because you seem so focused and positive, it will help.
Good luck for the future, and well done again.