Haha yeah I think that's fair to say that the scale will save me here, its true that all sizes are variable at the best of times, I think it must just be my area over here in England! Never the less thank you for all your input, I've weighed what I'm feeding at the moment as well and it comes in at 2-3 grams short of 15% of total weight so will b using that as my guide from now on!
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