Scania N113CRB luver SG 3Hrs max. After that sick of it liao. Normally plp mug until like that is that they want get all A1 . its impossible that you mug so much just to pass the subs. Also rmbr . Never go for the quantity . Plp study so much is becuz they want to correct teh errors they made. After correct these , practice all over again to make sure u are almost error free. Edit: I spend time learning more of technological stuffs than studies. I read more encyclopedias than textbooks.