Replace those heavy and expensive centrecase mounted control line turning blocks with lightweight acetal plastic fittings.

Saves weight (aprrox 400 grams depending upon fittings used originally), saves money (8 turning blocks plus shackles and mounting plates costs around $300)

10mm Holes with radiused edges for smooth running control lines.  5mm mounting screws with nylac nuts.

Simply drill three holes in the centrecase and mount (making sure they clear the centreboard)

NZ$60 (excluding GST)