Trangia x2 Multi-fuel Burner- Sooting

A quick upload of issues and possible remedies with the Trangia Multi-fuel x2 Burner.
Trangia's reply to link sent of this video:
Hi!
Thank You for a good and informative video. It is hard to get the right pressure, you need to practice at home and get to know the burner. And it is sometimes to many pumps and sometimes you need to pump some more. It is not a specific amount of pumps every time. But that would be much easier of course. 😊
Have a nice day!
Med vänlig hälsning / Best regards
Ms. Maria Laurin

Alsenvägen 16
835 96 Trångsviken
Sweden
Tel. [phone]
Internet: www.trangia.se
Facebook: trangia.sweden