Boy, a lot of models under the dam since the worm ... The first problem is probably the result of the worm being made as a single mesh then being sliced into parts. Only the very first and the very last segments have end caps. So, if you delete some segments, the normals on the inside of the mesh are reversed and so those polys will not be visible. At least that is my interpretation of what you mean by mangled. If not send me a pic and I'll take a look. I can tell you for certain what the second problem is though. I made the worm long before I discovered how to pre-scale the .obj to 4-5% and center at the origin before exporting for Poser. So, you can either read that section of the tutorials and apply them or you can just scale the worm down in Poser by selecting 'body' and using the scale parameter dial. Drop me a note if I can be of further help.