If you want to improve on the flaw questions, try work through the flaw section of the LSAT trainer... it complements 7sage very well and gives you mini flaw spotting exercises through its drills that fine tune your abilities.
Can't underscore LSAT trainer enough for flaws. Also, when you miss flaw questions, do you identify the flaw correctly but mess up at the answer choices or do you trip up mostly at the point where you need to identify the flaw in the stimulus?
... gotten a lot better at flaw questions. I used to be ... never. When I see a flaw question now, I can almost ... always identify the flaw in the stimulus but miss ...