So, I finally got around to getting myself a Guild, and I have to say... I'm quite happy that I did! My question is for those folks that know a little about the M120. Can you put medium gauge strings on this instrument? They come with lights... and I know they're modeled after the M-20s, which are usually played with lights. I don't want to end up screwing up the tension on the neck. I have the Westerly version.