G'day,
At the request of my wife I am attempting to hand make an 18kt Belcher chain Euro Clasp bracelet. I am currently attempting to learn the technique with Silver first but struggling hard.

The technique I am trying to use is also the only info I can find on the internet, seen in this video at 1:30 https://youtu.be/3T-2JxG3AqU

Studying the size of the strip he/she starts with and their fingernails I believe the material to be 0.3mm X 5mm Bezel strip.

I have attempted this using .3mm sheet, pipe with wall thickness of .4 and .9mm. the only a I have had it with the 0.9mm pipe but that is way too thick to replicate with Gold. Essentially while the video produces this shape ( ) I can only make this shape [ ]

Can anyone please help me where I am going wrong? My only option I can think of at this stage is creating a hot forge die press, and I'd prefer not to.