boolean is unpredictable, if it doesnt work then you'll have to do it manually- line up the lines of both objects to the area you want to combine.
then polygons-> combine
then right click-> vertex
then edit polygons -> merge vertexs.
3D Modeler and Texture Painter (Learning)
"We have limits.... our imagination does not"
Final Year: University of Bradford (Worst place to live and study in the UK!!)