Which controllers do proper 6 DOF washout for aircraft?

Do the Motion4Sim or Thanos handle washout correctly in the way that a commercial flight simulator does?

... From what i know, for now, only motion4sim has motion cueing incorporated on the controller.
I know others, but can't share right now, they might not even come to the market

I am surprised. Isn't that a basic feature of simulating vehicle motion? Without that, don't you have more of an arcade game than a simulation?

You can use software for that and that's what most of us do.
FLyPT Mover does it, but in the PC.

2 options: receive data in PC with FlyPT to calculate actuators "position" and request them to the controller or send data directlly to controller that calculates the position (Motion4Sim)

That is super helpful. Thank you. I will use FlyPT.

Within certain limitations, I would agree. While I very much appreciate Denis (M4S) offering filtering and inverse kinematics directly on the controller, doing the filtering and IK on the PC (e.g. Mover) is a well established way to do it. It also gives you a nice intuitive interface and plenty of tools for troubleshooting.

The only limitation I see, is the fact that windows is not a real time operating system. Using it to control a human-in-the-loop robotic system goes way beyond what it is meant to be used for. You can ask it to do "something" every 2ms, but every now and then, Windows may decide to just do "something else" for up to 16ms and that can be felt in the motion. It's not too bad, but noticeable.

Doing the filtering and IK on the M4S hardware controller (which can assure a constant cycle time under virtually all conditions) could eliminate not all, but at least some sources of microstutter.

Again: I would use a PC-based software as well. Just mentioning, that it might have certain advantages to do it on the hardware.

Cheers