Greetings. Gosh I love this site. So I'm trying to use a KDS-18 that hadn't been started in almost 10 years. So far, basic functions that I've tested (haven't gotten to the detergent cups yet) are OK, except there is water collecting in the sump. I removed the lower spray arm (surprised to find that it lifts straight off -- learned that here!) and removed the course metal filter cage that surrounded the spindle. But there's still quite a bit of water that collects down there, and I don't understand where the main filters are. There's a blue ring around the spindle assembly that looks like it might be removable, but I don't want to tamper without more info. Any hints appreciated! Thanks so much!