I have a prop that I want to turn into a conforming figure. The prop looks fine to start out with but when I turn it into a conforming figure it gets cracks up near the shoulder of the character. Below is a pic of what I mean. The orange arrow points to the cracks.

Does anyone know how to get rid of the cracks. I tried tessalating/traingulating the original prop thinking that it might be bad geometry but it doesn't seem to help.

Many thanks!!

Please visit My 3D Freebies

Thank you for your patronage!