This set from Aires replaces the stabilizers on the new Airfix kit. The control surfaces are separate so you can easily model them deflected up or down. A quick check of pictures of the real plane shows them slightly deflected down, occasionally deflected up and just as often with no deflection at all so it is up to you. The detail on the parts is slightly higher than the Airfix parts but if you are planning to model your kit with them not deflected I would probably stay with the kit parts. I did a quick check and the engine fits inside the cowling with no modifications needed.
No instructions are provided as they directly replace the kit parts.
Thanks to Aires and IPMS/USA for the review kit.