Erik Kostson
Ansys Employee

Since you are using large defections, you cannot use CERIG RBE3 (they are only for small deflections).

So you have to use MPC contact elements or MPC184 elements (a spider wheel is needed like you show in the CP image in your first post) for that see this helpful post on how to define them (mpc184 "spider" wheel).
All the best of luck