So i've been watching a lets play while playing ftb and it seems like the guy in the video has stuff from gregtech,like the industrial centrifuge, but i dont. I wanted to add greg tech but people said it was too hard and the recipes are very expensive.Then i found out that you can config the gregtech how you want and remove those recipes. My question is,how much can you change? Can i get it to the point where i just get the extra stuff,no need for changing the stuff and recipes that are already in the pack? Also,if i add it to the pack,can i continue playing in my world,will anything get messed up or do i need to start a new one? Thanks.