SR dosage for gradual transition off 7oh

Hello, so I am dependent on 7oh, and take right about 150mg a day for a bit now. I want to do a gradual transition off of 7oh and then sr. I began by taking 15 mg of SR 2 days ago in the evening, yesterday taking 15 mg in the morning, 15 mg in the afternoon, and 45 mg at night. Today I have taken 45 mg of sr - 3 times throughout today, as 45 mg x 3 seems like it will be enough to mitigate withdrawals from 7oh once I start tapering it pretty rapidly. I am thinking about starting reducing 7oh by 25 mg each day , starting the day after tomorrow - which would make it the 3rd day of maintenance sr dosing. After going to 0 7oh I plan on maintaining sr dose for a few days and then beginning a gradual taper down of the sr. Does this dosaging and sxheduling seem reasonable? Thanks.