I picked up a Shen-100 about 3 months ago and have been enjoying it quite a bit. I was doing some recording with it though and after setting it on it's side off in the corner, I go to pick it up and it sounds like something is inside sliding around. I get a little flash light and look in and sure enough, there's a little piece of wood, probably 1"x1"x.125" and some fair size curly-que wood shavings in there. I guess since it stay's standing most times, I'd never noticed. I'm guessing something through an F hole, but no clue what might be right and won't damage the instrument...