Hi folks. I'm having difficulty getting this to look right and then produce a watertight model for 3D printing.

Here is the original model without the blend



Here is my poor attempt at a blend



There are strange overlaps and it refuses to boolean together to make a solid. Thoughts or suggestions greatly appreciated.

cheers,

Chris

PS-I tried to post the 3DM file, but at 15mb it just gives me a 500 error. :(