This is possibly a very dumb question, but I'm planning on changing the rotors tomorrow and the Haynes says I can check hub end float using a feeler gauge, but I honestly have no idea how to do it... Help appreciated. Also, any advice on front rotor replacement? I took the wheel off and my first reaction was, what the hell, I've never seen a system like that before (having only worked on post-90s cars previously!). I've got a manual but any tips and tricks would be very welcome.