I replaced a very old Kreepy Krauly with a Polaris 280 and the 280 had such a small vacuum opening, the oak leaves just plugged it up easily. So I went back to the 25 year old Kreepy Krauly with a larger mouth opening, and it still worked ok. But its wheel rubber is wearing down and it struggles due to age. Can anyone recommend a reasonable side pressure crawling cleaner with a wide mouth and large bag like my old Kreepy Krauly. Does the current Kreepy Krauly have the same mouth and bag size design? I have a rough pebble bottom with odd stairs and places to get trapped. So in an ideal world, it would have a large mouth, large bag and 4 wheel drive. The Pentair 280 had 3 wheel drive and did not work well and got stuck frequently. Ideas, opinions?