What were the problems in recreating the set, matching the paint and the costumes?

We had to be very careful about that. What you may not know is that the footage in Trials and Tribble-ations is partly from The Trouble with Tribbles, but it�s also partly from another episode. In order to get Kirk in the position needed for Avery Brookes to relate to him, they went through thousands of feet of film to try to find the exact scene that could do it. It didn�t happen to be in the Tribble episode, but it worked.