Most Rocktopus have a very rough transition between head and body. I rebuilt this Rocktopus from the original Dr. Smolder Bravestone and the latest version of the mini octopus and made a nice smooth neck.
The 3MF file is from Bambu Studio and does not load in PrusaSlicer 2.5.2 (use the STL).
The chin overhang can sometimes droop a little. Tweak your printer settings (ie slower printing) or add a tree support.
The author remixed this model.