Thanks for the replies.Bx is mandatory here and what i usually do is install new rework boxes and drop jack chain down the walls then remove the old knob and tube and fill the old empty boxes moving room to room. If you guys have any more suggestions to make the job easier or tricks of the trade it would be greatly appreciated.Even though I'm a licensed guy you only know the work you that you do so with 13yrs in the trade I’m still a rookie at these types of jobs.thanks