You're fortunate about not having pain from your cervical spine problems, but many people do have them and they just never cause any pain. They are lucky! I'm not in that category and I do have chronic pain from my neck injury. At first I did what most people do, Take the percocets by the handful to alleviate the pain. At the peak, I was taking between 60 mg and 80 mg of oxycodone a day. Once the pain subsided and I started coming off of the percs (by making innumerable mistakes) and went through unbelievable withdrawals, because I didn't understand the Rx I was taking - I then educated myself on the drug.
My 2nd neck incident didn't cause as much pain as the first, but it was still significant. I took the oxycodone differently this time and only took as much that would control the pain. As a result, I took considerably less than before (5 - 10 mg/day) and it was much easier to get off (in a week) with very minimal w/d's. I did have to endure some pain, but it was pain that I could manage and allowed me to function normally. I don't think that we really need to resolve ALL pain, but just to reduce it down to manageable levels.
That is my new philosophy now, since I do have chronic pain which I have to manage. Most of us don't realize that when we're taking the pain meRAB it is OK to split pills in half or quarters and just take a little (I bite the pill to try to cut off a quarter - too hard to cut with a knife) - enough to manage the current pain. Instead, we would just toss another whole pill in our mouth and allow it to stop whatever pain was there or we though was coming. That's exactly what I did before. So, I can easily understand why people, like yourself, can end up taking large doses over time. We tend to try to catch up to the pain and to take a pill before the pain starts, when in reality we could get by with less medication to control it.
You really are doing great and I was happy to see how you progressed since you started your tapering.