Hi Kevin,
A rounded bead is exactly what I am looking for but I haven't even been able to get a properly burned crease line with the screw crease I have. I have tried heat, wet , you name it but all I get is more like a thin cut rather than a burnished crease. I purchase a more blunted edge crease tool but did not get the result I want. I thought it was because I am not able to apply the correct force (even hot) so was looking at a shoulder crease thinking that leverage might be the problem...I am sure I am over thinking this!
As for the shoulder pricking wheel, it was for sale by the same ebay seller from the U.K. that had the shoulder crease. Both items were shoulder type tools so I assume they came from the same set. What attracted me to the shoulder crease was that the metal part looked like cast iron rather than the steel that my crease is made from, which in my mind might heat more consistently and with better downward pressure I might get a more rounded indentation? But, what you said about using a shoulder crease is exactly what I thought - too fiddly.
Anyway, if you have a photos of your crease tool of choice and a finished piece showing the rounded bead, please don't hesitate to show it.
Thanks a bunch.
Jen