All of the passageways except for one are trimmed out with rosettes and plinth blocks. We'd like to trim the remaining opening which is currently drywall and baseboard. I am trying to figure out a way to cut back the baseboard on either side to make room for the plinth blocks. I know I could remove the baseboard but on two sides the run of baseboard long (12 and 14 feet) and I really hesitate to remove that and re-install it. Any ideas how I can cut back the baseboard without destroying the wall or floor? There is also a shoe molding but I am less concerned with that.