I have the perfectly rounded tool... pressing bars. I got a set delivered yesterday and it's just right for what I needed other than for bias strips.
Thanks Klue for the tips on using the water soluble thread. I didn't have the non-woven interfacing so I used muslin for the back. According to Klue, I just hit it with some steam, the thread will disolve, the back will come off, and you are left with an ironed under seam allowance to applique.