oops, my bad - you can disable constraints. the node state is keyable. if you change it to normal, the the contraint works - and if you make it blocking, then the constraint does not work. but it is worth knowing that instead of on/off switching, the changing of weights might be a cool feature. imagine 2 point constraints - one weight is with an expression: weight1 = 1-weight2 - this wayyour constrained object is always between the two goals and you can key one weight and the other adjusts accordingly ...