On Sun, 10 May 2009 20:39:41 +0100, Harry Bloomfield
wrote:

The lower spool does come straight out, the large screw head is
directly below the spool and I fancy serves as the centre for the
rotation - I was simply trying to add to the description in the hopes
someone might recognise it and the problem.

Well it definitely sounds like an alignment problem. Bent needle. Needle in the
wrong way round. Bent finger. Might be worth trying rewinding the bobbin, if
that too tight. Just trying to help ! ;-)

Andy C