In Cyb's Max ION tek, a PC is used.
Some report 3x45min PC boils help breaking more the bark and having a greater yield.
My tough are it's can usefull, but not mandatory.
3 or 4 long boil and reduce are effective so.
Depending on the timeyou have and material, it can be helpfull for you, or not ..
Powdering root bark really help.