I use a steam juicer to get the juice from the quince, about 2.2kg quince makes a litre of juice in 1-1/2 to 2 hours.
I add this litre of quince juice to 3-1/2 litres of apple juice to make up to one gallon, plus the usual 130g of sugar and yeast.
Quince cider stays cloudy but tastes...