Yes, a pair of Dykes (cutting pliers) work well. You do not even have to dull the edge, just go easy on the force you use. If this is your first pull-pull system here are two very important things to watch out for. First, make sure you do not have any negative Ackerman induced in the setup, positive is okay as long as it is not excessive. Second, do not have the lines to tight, just enough to have no slack at neutral position. If you do not know what Ackerman is, you can Google it or do a search for it here on the forums. It is the relative placement of the attach points on the servo arms/control horns relative to the pivot point of the servo and moveable surfaces and how it effects line tension as the surface is moved off center.