It takes like a week of printing, and like 2kg of filament, if you can get a takara stadium, just do that, but well, thirld world problems.

it uses 26  M3x20 and 14 M3x10 screws with their respective nuts

print the rails at 6 perimeters and 100% infill, i used petg, and use a .4mm nozzle as you need the teeth to be pointy

The arena is printed in .2mm layers as you dont want it to be too rough, and full perimeters

now, the ring and the shell print with at least 6 perimeters but you can go as rough as you want, the shell is soldered, and i cut the bottom 100mm to just use 3mm tick wood strips as they are flat profiles and would be a waste to print

downsides, with the shell you cant see much as it isnt transparent, maybe i should just make a square one out of polycarbonate