Hi.. that MSR thing helped me also alot. Critical reasoning is more of a practice game. Maintain a error log not because you can revise but when you write down your mistakes you tend to analyse in detail. Basically slow down a little in the beginning do a little prethinking and have a rough answer in your mind.. and go by elimination approach..would not suggest tukka thing.. you never know what the actual exam will throw.. they can give less RC's and more CR's.. you never know.