The common wisdom 'round these parts is that you'll score with +/- 3 points of the average of your most recent three tests. If you'll be happy scoring in that range, go ahead and write it -- just don't expect any miracles!
... company for which replacement parts were purchased last year ... the possibility of getting the parts from elsewhere. Just because ... obtain old siren replacement parts from the company it ... -----> Old siren replacement parts are considered difficult to obtain ...
@emli1000 I think GPA + personal statements help once you're within a certain band of scores. However, if you're below the 25% of top schools, they most likely won't look at other parts of the application.
I heard Nathan Fox's class is excellent. My guess is, like any course catered to the masses, there will be parts that are helpful, parts that won't. I have heard though that he's an excellent private tutor though his prices are steep.