My masonry chimney tiles developed a long crack and it was advised I put in a liner. There is an angled jog in my 22 foot chimney and me and my buddy can't get the liner down the last 4 feet past the angle. He's pulling on a rope and I am trying to feed it from the top. He's a plumber/heating guy and is suggesting I smash out one or two cinder blocks on the outside of the house, and part of the chimney tile, to finish working it through by hand. He assures me it's easy and safe but I am nervous to do this and was wondering if there are some suggestions others might have to get the liner through. It's a stove only chimney with an 8 inch horizontal tile at the bottom, so it's not easy to do much more from the bottom other than pull the rope attached to the nose cone on the liner, and even that's awkward through the 8 " horizontal tile.