That stick looks dull, even crappy to me.
Just 3 Kg of weight? Flimsy... Hope it uses suction cups underneath.
Not long ago I designed a eight pushbutton standalone joystick, with almost 16 x 14" (400 x 350 mm) CP footprint. Never built, altough I got the precut panel sets (for free of course). One of my initial goals was to get around 12 Kg of total weight for it, but I slimmed it down to 9 Kg in the final version (a friend of mine told me it would get uncomfortable if used over the thighs).

Obviously my design goals for an arcade like joystick were quite different...

Cheers