For the mainsheet someone recommended the New England BZZZ Line 8 mm which is reasonably priced. You can order it on catsailor https://store.catsailor.com/pc/viewPrd.asp?idcategory=243&idproduct=30421

See hobie's line guide pdf at http://www.hobiecat.com/support/pdfs/LineGuide.pdf for lengths









~~~Ron