community tech tree??

[zyco187]

I am interested in installing mods that come with parts(ie. interstellar extended) to go alongside my career. Do mods like KSPI-E need the community tech tree to work properly in career mode?

[Streetwind]

Generally, the way CTT is built and designed to be used means that its absence never breaks anything, even in mods that are specifically built for it. If you don't install it, the parts just land in the stock nodes instead (unless the part mod's author did it wrong).

However, you probably don't get the intended gameplay experience without it, because the stock tech tree is much smaller, to the point where progression ends before you even think about stepping out of Kerbin's SoI.

Note however that CTT isn't your only option when it comes to tech tree replacements. There are others, following different design philosophies.