I did the bike tube on mine and have helped a few other guys do it, and every time, it has stopped leaks. While we're there, we also blow out the drain tubes and then pour some water down them to confirm that they're clear. The whole thing takes maybe 30 minutes to do and only requires a 10mm socket. Uh, and a compressor, but only if you want to blow the tubes out while you're there.
The extra space that the tube takes up between the glass and the body may possibly fix the rattle, especially if you never open it.