I like a slightly larger loop for the quickstops especially when using soft baits. I feel more confident if the knot and two thicknesses of line are in the bait, I reckon there is less chance of it cutting through the bait or the bait being robbed by tiddlers.
I use a much simpler method. Tie an overhand loop as usual. When you pull it tight, loop it over the end of the quick stop. This in effect ties the over hand loop around the quick stop. When you have drawn it tight, slide the knot off the end of the quick stop and give a final pull to tighten. This form a really tiny loop that the quick stop sits on.