I do what everyone else does: I cut the feathers with some wire snippers just where they come outta the skin on the wing. I NEVER use that far up the quill anyway, and trying to jerk those big feathers out of the wing requires a lot of muscle (and you can damage the feathers if you slip).
Just cut them, or use a hacksaw to saw thru the quill. Hell, you could even burn the quill with a very small flame, but that's risky. Not to mention it would smell up the whole house, so do it outside!