I think I may be in love.....
I brought the FW into work this morning, sat it on the desk, put a few FW videos on, and fixed her!!
Not only did I sort the bobbin area out - it was filthy, the tiny holes were clogged and there was thread..... cleaned, oiled and re-assembled and everything went together beautifully.
But, the tension still wasn't right. I've done this before though, with the 99k, and the 201k. It may need readjusting later, but the difference in the stitch quality, is just amazing.
I've sewn on leather too, and that went without a hitch.
I can safely say, that my little FW, will now be used often!
Thank you both for your help, it gave me the courage to try to fix it myself!
Jessie