Ok, that one shouldn't be too hard to adjust. CO one or 2 sizes smaller than you'd normally knit, according to whatever gauge you come up with. Do the decs and incs until the back sts measure about half what you want for a finished size, work the sleeves and decrease the yoke. It's similar to Shalom
which is a top down pattern with ribbing on the yoke. It's done in a light bulky yarn which may work better with your yarn. You could change the ribbing to the wider rib that the Drops pattern has.