I went to the LHBS yesterday to get the ingredients for Jamil's Oatmeal Stout recipe. Well, instead of grabbing 2 oz of EKG I grabbed 1.5 oz. So....this only gets me to about 29 IBU's. I have some Magnum and was wondering if that would be ok to sub in for about .25 oz @ 60 mins to get me in the 36 IBU range? TIA.