Hi Cecilia
Now that I've looked at your pics I'm pretty sure the bobbin winder and tension assembly is the same as my Phoenix 250, so I will take pics and look into your questions and post back tomorrow when there's time and daylight. We'll get to the bottom of this! Mine has been driving me mad.... but I am 90% sure I'm getting a manual from Germany so I'll be sharing it with the world when I finally get this machine going!!
(PS - mine's called "River" - hehe)