This is the design uploaded by Mike1701, which had quite a few internal errors (designed for looks originally not for printing Id say) that my poor little Up Mini could not overcome. I completely cleaned out the interior bits and pieces and made it as solid as I could. There are some tiny little errors that I can not find (software insists that its an incomplete model), but it prints nicely now at least.

Print either in one piece or use the 4 piece version and Glue.

The fins at the back were a little thin when printed at the size I did, so I gave them a quick paint of Black Acetone/ABS Glue and that made them stronger.