<polygons/poly components/normals...> Why is this? what's the use for it ? is it wrong to have them faced inwards ? what's the idea behind it ? picture yourself a piece of glass.. if you look through from one side you can see through. now if you look through from the other side you see yourself. polygon surfaces can be one sided (like the glass analogi(sp?) above) or double sided. If you had the transparent side facing out (normals facing inwards) you couldnt see your object (or atleast it would look wierd at render time) When you attach a surface to another you have to make sure that both surfaces face the same way (normals facing outwards). Besides that you also have to make sure that your edges flow the same way or they wont attach. (think of edges as a zipper. you cant reverse one edge of the zipper and zip it closed ) About your last question... check if you have a face on the axis from your extrusion and delete it. (should be along your ZY axis, vertically through the extruded neck) I hope your enjoying the tuts and learn lots