In my opinion, the velcro closing system the Pentair Racer uses is a horrible design. After a very short time, the velcro has so much debris stuck to it that I cannot get a good seal. As a result,, the top of the bag opens up and everything the Racer sucks up is blown right out of the top of the bag, back into the pool. The replacement bag from Pentair is very pricey so I'm reluctant to spend that much on a new bag with the same design flaw. Has anyone found a good replacement bag that works with the Pentair Racer that does NOT use velcro? Maybe a drawstring design or zipper? Looking for suggestions. TIA