Looking at doing a 11l blonde ale. 1.042 OG 15ibu. It will be 98% pale ale malt and 2% light crystal. Wanting to add Raspberries at about day 3 or 4 to primary fermenter. Would 1kg be okay or should I add more. It will be fermented at 20 degrees using Kolsch dry yeast. Not sure whether to pressure or normal ferment. Would it be better to secondary ferment.