I don't know if anyone else knows this, but out of necessity I learned this trick while installing my first bow type headliner. Instead of headliner clips you can go to office max and buy a tub of mini paper clamps. You can use them for keeping the liner tight horizontally. The great thing is they're easily movable as they have tge wires that allow you to release and reposition them until the headliner is perfect. Once it is just right and your satisfied you can squeeze tge little wires and they come off leaving the black mini clip! Hope this helps someone, I know it made my install a breeze...of course if this is common knowledge just ignore me
