Thank you. Eric Austin has worked with me a lot on the finer points of floss bodies, tinsel tags and the like on traditional winged wets. I have not got to the point of counting thread wraps, yet, but find myself slipping that direction sometimes. I have found that the techniques Eric has been encouraging me to use carry over to lots of flies, dries, wets, nymphs, you name it. I was attempting to apply technique from the traditional wets to the salmon fly and it worked most places. I could not, however, keep that topping from rolling on me. Eric's tutorials are quite good on these subjects as well.
I was trying to keep the bulk of the body down but would normally tie the materials the length of the body with a wet for the same reason you mentioned. Now that it has been mentioned, I seem to remember either reading or being told by Eric something about the core of the oval tinsel to avoid just this thing.
The floss is one strand of 4 strand Danville floss wrapped back and then forward. The thread I used for the bulk of the fly is white UTC Ultra 70. That stuff flattened out very nicely helping with the smooth body a lot.
I have another one in the vice that is much more involved. I have not settled on a wing as yet. I am leaning toward building another set of those married wings I destroyed on the first one. We'll see.