I was trying to shim my starter today, when I had an unfortunate fumble. I dropped the shim, and it ended up falling down into my flywheel housing. I'm wondering if anyone knows how much room there is at the bottom of that housing? Can that shim cause big damage being down there? If it can't stay there, I'm guessing the only way to get it out is to pull my engine. Any advice would be gratefully appreciated.