Top rail clip-on bobblehead rock

Remixed bobblehead to mount to top rail of printer instead of free-standing. Updated as fault found with clip by my son. Internal dimensions of clip need to be min 18.20mm internal top-bottom to suit rail (i made them too tight in the stl) Quality of the rock head is my fault, not an issue with the file (I haven't used this filament before and didn't calibrate)