1) Knüppelgriff 13
Compatible with Virpil, Thrustmaster Warthog, Cougar or VKB NXT joystick bases.
https://www.thingiverse.com/thing:5019561
2) Angled Adaptor
Compatible with Virpil, Thrustmaster Warthog, Cougar bases. Another solution is available for VKB NXT.
Turns a joystick into an omnidirectional throttle grip. Ideal if you already own 2 joysticks to fly Star Citizen or Elite Dangerous for instance. https://www.thingiverse.com/thing:5023546
3) Friction Cam
Compatible with Virpil WARBRD base only.
Maintains the stick in place when released, instead of pulling it back to the centre. Ideal if you want to turn a left hand joystick into a throttle or a collective. https://www.thingiverse.com/thing:5036677