OUCH!
I learned about letting springs unwind a few months before my first gramophone purchase when I decided to try and fix an Ansonia clock just after my 13th birthday. No blood & gore thank goodness, but we were picking up clock parts in the lounge & dining room for a week.
When I got my first gramophone about 4 months later, I was lucky enough to be introduced to a long time collector by my next door neighbour, so a few weeks later my mum dropped me off at his place one Saturday morning, & he showed me what to do & what not to do.
It certainly makes a huge difference when you can actually see how it's all done, as opposed to guessing or even reading a book. It allowed me to be able to pull diamond disc springs in & out of the barrel before my 14 birthday.
I've posted this video here several times before, but might as well post it in this thread too.
[youtube]
http://www.youtube.com/watch?v=rbPa-VWAzSY[/youtube]