Ok, so chimney is done and new wood stove is in place. I just need to connect stove pipe and fire it up. The single wall stove pipe has been snapped together, 2 full sections and a small cut 3rd section all lined up to go. But wait, they won't fit into place! The last bit is too long, and if it's cut shorter to clear, then I lose the necessary overlap. Help! How can I make this fit into place? Surely, folks had a way before telescoping parts and slip joints.