This message is for all Canadians: If you only need a 160, just keep PTing and build up your analytics, drill the problem areas, and make sure your LG skills are on point... that is all.
You can also "star" questions you miss on PT's using 7sage analytics ... This is HUGE to me as I can simply select all of my tests and sort by the stars! And then target them with my intellect.
Don't touch a PT until you finish the curriculum... Then take 3-5 PTs, check your analytics and adjust fire from there. Doing them before you finish the curriculum is what we call "wasting PTs".