Welcome to the forum! Never heard of "Robert's suboxone taper plan".??
If your using history is a year and a half and you were taking up to 60 mg/day of percs.....those are short acting....NOT synthetic....and you'd be better off to either taper down (or if you can't taper like I couldn't) just bite the bullet and be ok "not being ok" for about 5-7 days.
Suboxone has a purpose....but for your habit/addiction....suboxone is WAY stronger, totally synthetic....has a LONG half life so getting it totally out of your system can take up to 21 days. If you just get off the percs w/o subs....you're body will heal MUCH faster.
Here's a conversion chart so you know how much sub is equivalent to what you've been taking:
http://www.medhelp.org/user_journals/show/18499/Conversion-table-other-drugs-equivalent-to-sub
You're using a MUCH stronger opioid to get off an opioid....just my take~