Going out today on our maiden voyage with some new wheels. I built up a set of wheels for the tandem using a self modified Shimano M-760S 32 hole Freehub, I have a write up at my site on the conversion,
look here. Rims are double-eyelet DT Swiss R 1.1 32 hole, spokes are Wheelsmith DB 14 w/brass nipples. Total difference in the weight is 879 grams (879 g = 31.1 oz). Finished the wheel build last night. Will be reporting on the ride today and in the future on durability.