I used rick's #'s also. I can run a 6,10 leads and a copper of the boards with out problems. That is at once. I run 200# power pro for tow line. I don't have a mast so tow line runs off front corner of hard top. Pulley is probably 7-8 above water, But I don't get no big bows In tow line Like you described. Good luck and hope anything I mentioned helps.