Did you removed the cable guides?
You mean this:
No i didn't remove it. I have seen ip-256 frames with guiding tubes but mine didn't have them.
I did switch the derailleur cables to get a better curves at the bar. So the cables cross in the down tube.
Inside the chainstay is some kind of tube but there is no way to see it, if you put the innercable in the little hole in bracket it comes automatic out the end of the chainstay so there must be some tube.
little hole left bottom corner: