Jonn, I stacked the deer hair head. The tricky part is to stack around the dumpbell eyes. I used 2 figure 8's, one on the top and the other on the bottom (see my Loomudclousky post).
Yes, Jim. These flies are about 5" long. I'd tied some up to 8-9" long. I took the 5" flies out for a test drive on the Fox today. It was light enough to cast with my 6wt and had great actions.
Mike, I figured if I could tied these flies on shanks I could tied them on tubes also. With about $25 add'l investment, I tube fly needles and tubes are on their ways.