well it started life as a Sigelei I ching. - They have a notorious system of placing the batt vent holes on the screw threading ( wtf ) - so your left with a thread gap.
I got two 2mm holes drilled in the tube and then hunted down a right sized Stainless Ring that would fill the gap.
Now as you can see in the pic, trying to handpolish the taifun and the body. - should look quite smart. - The extra ring is just something i picked up cheap on ebay lol.
Done my measurements (22.2mm) and it fits nice n tight.
Just makes something a bit different.