22,5cm (can be shorter too)
15g
The Oneth was created by Akai, a famous vietnamese penspinner.
His mods are well known to be designed and assembled with a very specific structure : avoiding the rattle of the mod while spinning.
The Oneth is a good example.
Tutorial video
In order to add more weight, I added this structure below into each cap : a part of a kaco backplug + a metallic backplug. I forgot the origin. Either from stalogy or drgrip shaker.
I also put some paper into the body for a better balance.
Now my mod is 16,5g, which is nice for my hands 🙂