This are probably very very basic questions, and I am probably missing something obvious. But:
1. What is a string winder for? Why not just turn the machine head in the usual way when changing strings?
2. The action on my acoustic guitar is very high and it's difficult to barre the strings (as I have mentioned in another thread). I think I need to change the strings, as the current ones are green and clogged up with dead skin. If I get a lighter gauge of string, will that make them easier to press down? I gather I might lose a bit of the tone and resonanance usually associated with an old and cheap Yamaha FG guitar!