I watch over Trinity project for as long as 3 years. I want to give my grade on its development activity. I think that the project is not capable of public use and rather suited for small group of inside hackers. Along the history of development there were too much lame unprofessional decisions. It was fulfilling some strange unpractical ideas. In fact, it came to a logical unsuccessful end. If you install 3.5.13 you will get too much trouble. I think, that implementing all the missing features into KDE4 is less cost, than waiting when this woe project will get to a decent condition.