I am a huge fan of Tekkit, have been since the launcher came out but I can no longer play it. Whenever I attempt to play through the Technic Launcher, I get unplayable FPS lag. I have no clue what causes this and I know for a fact it is not my PC. I used to manually add every Tekkit mod into my vanilla Minecraft and it would run like a charm, but I can no longer do that. Does anyone know how to add the Tekkit mods to vanilla Minecraft or have any other suggestions as to how to tackle this problem?