If you have an XP Deus with WS4 you know that the headphone plastic is much to flabby. This head phone is an alternative.
You'll need (4x) M3x12 or 15 bolts with M3 nuts.
A drill bit of 3.3mm.
A drill bit of 2.5mm.
(4x) 3mm screw
Print it all at 100% infill PLA , layers 0.2mm
People with flappy ears can make the angle bigger by turning the pins of the brackets.
They are currently about 10 degrees. (the thick WS4 part with the buttons is for your right ear).
I cut the (very thin) wire in the middle and soldered them back together.
The rubber of the ear cups will fit into the caps.
On the first photo you see me wearing the prototype. At that time I didn't have the left and right cup. So I fucked up the phones by drilling small holes in them. That would be inconsiderate to ask from you, so I made the cups. That way your ws4 will survive the operation without any damage.
I use these headphones all the time now and its a huge improvement.
EDIT: May 9, 2016 - September 29, 2016 still using them.