Attempted a similar detox program with Dr Sponaughle in approximately 2010. The detox went well and there was no withdrawal. However, at that time, the pain was unbearable and I had to go back on the meds. I also decreased Lyrica dose  on my own two years ago which backfired and caused neurological issues. I have currently been decreasing Seroquel and Morphine doses on my own very slowly.