i have always center drilled my ca hinges even if you cant get your covering trimmed back enough the center hole in the hinge slot lets you get the ca where you want it. i used the small ca tip tubes for the first time,and wondered why i never used them before.man those things are neat they saved me about a third of a bottle of ca on a build i just finished.they worked great for doing the ca hinges,i usually have to hold a towel soaked in acetone behind them, with the ca cap tubes i managed to actually get 4 to 6 drops in the hinges and didn't spill one drop.