The file 'Remix Of AtomRC Swordfish Weighted Tail With M8 Thread 3D Printer Model' is (stl) file type, size is 240.8KB.
I added an M8 thread through the center so you can directly attach an M8 screw with washers. I thought this looked cleaner.
Swordfish_M8_Counter_weight.stl | 1.2MB |