Have you ever had seizure or psychosis from rapid benzo taper? Benzo withdrawal can result in death, so I can't recommend doing a rapid taper by yourself. 8 day detox with medical staff supervising with an array of medicines at ready can't be compared to doing it at home by yourself. And even 8 day medically supervised detox off 15 yr benzo habit isn't advisable imo, considering that the acute withdrawal can last 2+ weeks, and many report having seizure after day 8.
Physical dependency happens very quickly with benzos, it's a matter of days or weeks. I'm not sure how quickly things like receptor down-regulation of gaba and upregulation of glutamate happens, but the presence of tolerance is a sign of this. Being that you could take 10mgs a day, I'm assuming you have a fair amount of tolerance. You can try dropping dose down to maybe ~5mg/day and see if your stable. I don't think you need to star the taper based off your max dose.
Either way, you'll have to find a dose that stabilizes you and removes you from withdrawal. Then, start taper from there.
Some things to watch out for:
-dehydration and low electrolytes. This will greatly increase chances of seizure, if not be the cause of it.
-Nausea, vomiting, diarrhea. This will all lead to dehydration and nutritional deficits. Electrolye drinks, anti-nausea med, can help. Supplements may or may not help, depending if you are able to digest them or not.
-Exaggerated stress response, due to low GABA and high glutamate levels. Supplementing with GABA precursors might help recover faster, but won't remove this exaggerated response.
-Sensitivity to sound, possibly becoming auditory hallucinations. This usually precedes psychosis, or is the beginning of it.
-Insomnia or poor sleep. Supplementing with melatonin may help.
GABA plays a very important role in the brain. It is what regulates glutamate, the neurotransmitter that causes excitement. Without it we can go into seizure and/or literally go crazy and start hearing and seeing things and become completely delusional. Having someone around who can get help if this were to occur might be the difference between life and death, or less severe, jail and hospital, or potential brain damage if you are to go unconscious and stop breathing.