Small update. Just cleaned out the sunsun yesterday and wow! The amount of junk that came out of that bad boy was impressive. After starting the siphon to the bathtub and putting my 8 year old daughter on fish alert (she gets to hold the siphon hose and guard the inlet) I disconnected the quick releases (almost no water loss) and took that bad boy to the tub. I laid it down on it's side with inlet and outlet closest to the bottom and drained the water inside. The goop that came out during that step was pretty impressive in and of itself, but when I got down into the baskets I was IMPRESSED. It took me about 30 gallons of tank water to rinse down all internal parts. Ceramic rings, coarse filter pad, bio-balls, and polyfill were full. Added some carbon to the mix in an old pair of the girls' tights and re-assembled. Water still crystal clear. Pump still completely silent. Hoses and fittings showing no sign of stress or wear, other than being a bit scummy looking on the inlet side close to the window. Still the best money I've ever spent on a filter.
Still available under a different name from the ebay seller I bought from kool_goods. His/her ebay store koolest_goods. Though he appears to only have the 3 basket, 100 gal model at this time.