This is where the Unger Nlite scores. It has very robust external pole guides. The pole hose can be clipped under it from outside rather than threading through. Also the bottom end stop has a side feed so the pole does not rest on the hose when on the ground. Getting some grit inside the pole is almost inavoidable unless you have the time to clean the hose constantly. This will shorten the life of any carbon pole.
Steve Hiclean UK