Honestly I think you could make great gain. HELL Not that ya need it being that you are 17 and quads are 31"
But I really think you could get a complete workout doing 3 worksets of squats as follows. All sets are 1 rep short of failure or just about failure. 1st set to 7 - 9 reps rest 3 minutes 2nd set 1 - 5 reps rest 3 minutes. 3rd and final set 10 - 12 reps. Done now rest 3 minutes and hit the leg curls.
Give it a try for a month. Your joints may just be thanking you for the lower number of sets.
Best of luck to you whatever you decide you are a good kid.