I ordered the replace bellow, which arrived promptly. I have had to get inside this machine more than a few times (the filter is only accessible by removing panels, as there is no access door, so I had experience getting to the bellow here. The inner locking ring is way easier to remove and install than the outer spring one. In any case, the actual bellow install took about 10 minutes once the panels were removed (which took roughly 15 minutes). Mold is gone and there is no more leaking. Wish this part wasn't so expensive, but alas, it's still way cheaper than a new machine.