Hugh, I believe that the busted arse 743 sim will be gone as of mid year when two of the four remaining Classics retire. In the currently empty Sim Bay 3 will be a Dash-8 Q400 sim and eventually in Sim Bay 4 will be a Dash-8 Q300 sim.
I don't know where the JQ applicants will be tested after that as all the other sims will be flat out for the next 7-10 years.