Hi Darren, sorry to bother you again.
I carried out all you have written, the Huji is in that state now. Still, from time to time after a few stitches the wheel gives resistence, more or less blocks, when I go further the upper thread brakes, when I rotate back a little I can continue. The tread seems to tangle in the shuttle. What happens is that the thread got stuck between the shuttle (hook) and the wall. See my picture attached (if I did it right).
I find it difficult to determin if the upper side of the eye of the needle is level with the plate of the carrier, any tip?
Your experience is appreciated again, thanks Henk