I was not motivated enough to finish T3 or T4. Next time I play I will cheat the book rather than running around and scan all over again, even so it is easier after reading what should be done. I found it too boring move those symbols, craft more ink and combine primal aspects all over again because you have to switch on and off and all over again. OK there is mastery there so you can move runes without switching them on and off. But then you need to run with wand from one place to another. And then you need to run and collect all those aura nodes again. And then you need to run around infusion and placing staff back when if drops. And then you fight with Taunt because it is eating your world, but you did not discover right flower yet. I think Thaumcraft 4 is nice illustration how difficult Harry's life.