For those of you afraid to cut good roots, chill out and just do it! Leaving a bunch of live roots which have been broken in cleaning will lead to nothing but a rotten mass of dead roots filling the pot in no time. Cym roots regenerate very quickly and that is what you want to fill the pot. Also, what SBOE did not say, was to remove ALL roots from any leafless BB. I have been at this for 50+ years so I have seen lots of repotted plants, good and bad.