Just be patient with it, get the cable through all the way before pulling out the liners. You can pinch the liner with the cable inside and pull on the liner through stubborn bits. Cables with welded ends will make your life easier. Or pop some superglue on the tip of a cut cable.
Silver Ultimate CF SLX, the Aeroad doesn't quite have the length I need in the seatpost and way too much reach. On the Ultimate I can run a size 58... such pro (for anyone reading who doesn't know me, I'm 6'6").
Just be patient with it, get the cable through all the way before pulling out the liners. You can pinch the liner with the cable inside and pull on the liner through stubborn bits. Cables with welded ends will make your life easier. Or pop some superglue on the tip of a cut cable.
What did you go for?