5 meo dmTed,
I take an average of 120mg - 150mg a day...then if I get one of the headaches that a bullet in my neck would feel better, I can go up to 180mg+ a day. Most of the time it's at the 120mg a day...so that's 1/2 of what you're doing at
240mg a day.
For me to go from 120mg to 10mg a day and not be SICK would-not-work!!! And like I say, I'm at an average of 1/2 of where you’re at. Maybe cut around 1/2 from where you’re at and go from there stringing it out.
Last month I had headaches from my neck almost 2 1/2 weeks straight, so I was closer to the 180mg a day a lot. That meant the scrip went down too fast and I had to cut down to 90mg, then 75mg, then 60mg, over a few days about the last week and a half. I had one pill (15mg) left to take the day I went in for my next script. Most of the time I'm out at least the day before.
When I got down around 75mg - 60mg a day I started drinking a lot of white grapefruit juice. With the juice I didn't feel any real discomfort. I could go twice as long between doses and take a lot less with the SAME EFFECT. It was like a 2 for 1 sale on Oxy!

Come on down, there a goin` fast, and will not last!!!

There guaranteed not to rip, rattle, rust, bust or collect dust! (Juice = why I didn't run out for the first time.)
I'm not sure in your case drinking the juice is a good idea with wanting to stop Oxy . It keeps the Oxy in your system longer and at a lower dose...so that may be going totally against what you’re trying to accomplice? (Maybe someone around here would know if it's a "+" or a "-" for cutting down and out?) But on the other hand, IMO, it would be good for the mental thing of cutting back to stop.
I know it would be cheaper, but that's not a good idea for you because that was a reason on your con side of the page to quite. In other words, oh, now I can justify it because now I can spend less, so let’s keep right on keepin` on. We scampering around little addicts can justify anything in our minds about the drugs flowing!
As far as drinking a lot of "white" grapefruit juice for the Oxy, my wife read up on it and it works...just as I read here on BL. If you are taking blood pressure meds some of them will stop working from the juice. (I fall under that, but it didn't affect one of the "listed meds" I take for BP that it "should have." My BP was lower than normal. 130/72 ) I don't remember, but I think over 16oz a day long term isn't good for some enzyme your liver makes. Also, no sugar in the juice because it either kills, or lessens the effect.
Good luck to you!!! If you can do it on 10mg a day, GREAT!!! If you can't, then up it where you have to and go from there. Someday I hope I can get off of them! If I ever get injections in my neck, or what's needed to fix it, I'm going to try to stop. I think over time I can learn to live with the bad discs in my low back, but the headaches are just too damn much without the meds!!!
Leaping Gnome