New here and have a few questions. I am in the process of gathering pieces to install a wood furnace. I have a double masonry chimney meaning upstairs has fireplace and basement has insert currently, all on one chimney. My plans was to line the section to the basement but here is where a possible issue arises. The liner is offset from the box by about a foot and a half or so. Before i buy the liner how flexible really are they? I would hate to buy the liner and not by able to make the bend for it. Or is there another option to line it? Thanks