I have been using my Volcano Digit for several years and absolutely love it. However, I've recently noticed the machine making a clunking noise inside as I remove it from the case. I also hear the noise when I set it down on my table. Is this normal or should I send it in to have it looked at? Everything works great but I'm worried a bracket could be broke and the pump is moving around inside. I tried removing the dome but couldn't really tell if anything is screwed down or if everything just sits in the base. Also, I have several used easy valve bags/mouthpieces and I want to replace the bag portion. What's the easiest way to pop out the clear plastic piece to do that and what's the best bag to purchase for a replacement? Thanks and I can't wait to hear from everyone! Have a great evening and weekend.