OK boys, here's the question. I am thinking of knitting Jared Flood's 'Cobblestone Sweater'. The patterns is for Aran weight yarn (18 stitches for 4 inches). However I have some nice dk weight yarn that I would like to use. Now, I know it is doable, but how big a fiddle would it be to change the pattern for the lighter yarn? Anything special I need to keep in mind to do it? Do I need a Degree in mathematics to figure it all out? Or has someone already done it for me somewhere? I know this is not an impossible problem, however, I really dont want to screw this up. Suggestions?