Garcia's advise is good.
A friend of mine replaced the handles on some of his 5500Cs with a bigger single paddle handle to get better canking leverage. He got the handles though John's in Everett.
Ever since, those ambassadors have given him trouble. Even a couple of stripped gears, and numerous visits to the reel repair shop. (He also has these reels loaded with 30lb braid which probably also contributes to the seemingly excessive wear on these particular reels.)
And of course the 5500 C3's have the 5.3:1 ratio.
I believe those same handles on a 6+:1 ratio C4 reel would cause you even more problems than what my buddy has delt with so far.

J.D.