Probably it depends also on the kind of mods you are and have been doing so far ... Mine inludes a lot od 3d custom content so I spent much time in 3d , zbrush , photoshop ... Etc... But my time modding is not comparable to ck only because on a 100 scale probably ck takes 30% in 3d and tools 20% and banging on the keyboard to make stuff work in game for the many bugged stuff 50%...