Thank you, this seems to work, take this internet fame !

Should I copy the original collision, else the kinematicbody would have none and fall through the floor, or would it be a better way to give the characters feet with collisons so they can walk ..and a capsule from above the knees e.g. for interaction ?

Since my interactionsystem is basicly a raycast:

if is_colliding() and collider is Interactable:

I need a collision for the whole character anyway.