Unity Version for 1.3.1

[Krakatoa]

I'm attempting to create a couple in game items, and I'm at the point with my first model that I need to run it through Unity to turn it into an actual thing. The most recent official forum note on the matter was the release of the PartTools version for Unity 5.4.0p4, which is findable on the Unity website, but there's a more final version, 5.4.0f3 when you first look for 5.4.0. Is there an official word on the download of Unity and version of PartTools for creating something for 1.3.1? Thanks!

[SchwinnTropius]

To make parts for KSP, you only really need at least Unity 4; Unity 5.4.0p4 and its PartTools is required only if you intend to make KSPedia pages (to my current understanding). Personally, I like to use the Unity version KSP is currently running (5.0.4p4), but it's not strictly required to run parts through it for the game.