I've recently added a Moonman M1 in brass and Tiger wood to my collection and am glad I did. The pen was was about $12 on Taobao.
The pen is relatively long and slim. The section doesn't taper much at all. The cap takes about 3 turns to remove. The cap could post, I suppose, but the threads would likely tear up the wood and severely mess up the balance.
Moonman M1 Dimensions
13.5cm / 13cm capped / uncapped
26.2g / 16.7g capped / uncapped
8mm section diameter
12mm barrel diameter
It uses the same screw-in nib unit the Delike Alpha and New Moon 2 so if you have any of those pens, you can easily swap nib units.
Like posting, eye-droppering this pen has got to be out of bounds. I don't plan to find out.
The fude/art nib turns up only very slightly. It creates a sweetspot so that when the pen is at the correct angle the pen writes with a remarkably broad, wet line. The nib in my pen was smooth out of the box.
The writing experience with the pen is excellent. The balance is toward the front making the pen feel lighter than it is.
I'd definitely recommend the Moonman M1 for folks into fountain pens. Probably not as a first fountain pen, however.
Two thumbs up for the fude/art nib!
More photos and comments here