well done on the race, and kudos for "adapting to circumstance and keeping her going after something breaks", an essential skill for sailors ;-)
I echo the good advice above. Another thing to keep in mind is the angle of jib lead, you want the sheet to sort of bisect the angle of the clew corner. Or put another way, the sheet, projected "upward" in the same line as it has from block to clew, should bisect the luff, up to maybe 10% above that mid-point. Poor sheet angle will slow you more than you might gain or lose by having the tack itself higher or lower than "standard".
I echo the good advice above. Another thing to keep in mind is the angle of jib lead, you want the sheet to sort of bisect the angle of the clew corner. Or put another way, the sheet, projected "upward" in the same line as it has from block to clew, should bisect the luff, up to maybe 10% above that mid-point. Poor sheet angle will slow you more than you might gain or lose by having the tack itself higher or lower than "standard".