Disable or not disable, Gregtech mod?!

Hi guyz,

i've one question for you!
yesterday i started a new world in FTB ultimate, and i saw that the recipes of a few things are very very more expensive then the tekkitlite mod.

after a little research i found the problem....Gregtech mod has changed the recipes!!!!

So, can i disable that mod, or is important for the Pack?
if i disable it, is all ok or i can find some bugs/conflict?

i hope that my english is good ^^"

thanks in advance for the reply!!


Byeee!
Alfa