Well, I was going to do my first all grain batch tomorrow. I got the Irish Red Ale All Grain Kit from Northern Brewer and they forgot to include the 1 oz of Willamette (60 min) and 1oz of US Goldings (30 min) - I hate these kinds of screw ups. Anyway, I have plenty of Cascades in the freezer and 1 oz of Saaz. Can I substitute these for what was supposed to be in the grain bill, Which one would you use at the 30 mark?