Qingqi USD forks info?

[forchetto]

Does anyone know anything about the beautiful 41mm USD forks used on the Qingqi-Qlink-Pulse-Sinnis-Ramzey-Yuki-Hooper-Kreidler-Sundown QM200GY-B Super Motard?.
The parts manuals only show the complete fork, without details. There's very little about them on the net.
I'm looking for details such as dismantling procedure, oil type and capacity, etc.

These forks are (or appear to be) beatifully made, with an outstanding turned and ground finish and their action is very good, albeit a bit soft, yet no one knows who the maker is or any other details.

Their size is 41mm which seems very generous. This size is shared by such bikes as:

Yamaha YZF 750 R
Triumph Daytona 675
Kawasaki ZXR750
HONDA CB600F Hornet
Hyosung GT650
Kawasaki Z750
Yamaha 1670cc Road warrior
Yamaha R1
Yamaha YZF-R6
Yamaha YZF 600 R6
Yamaha YZF 1000 R6
Kawasaki ZX-6R Ninja

I only ever found this picture of a dismantled example: