I use Paterson major in a way that I fill it with water, put each print in it after processing and when I finish printing session from that moment I start water to flow into washer and wash about 1 hour. So, last processed print is in washer and activly washed atleast for 1 hour and prints before last are already in washer soaked in water. So, even if last processed print do contaminate earlier processed prints I wash all prints atleast 1 hour, so all prints are properly washed at the end...
About Dave's remark, I measured (still didn't wash 30x40cm paper in washer) inside dimensions of Paterson major washer (that is paper basket dimensions and inside wall dimensions) when I got it, and as I can remember there is about 1 or two centimeters more space than paper size (at both lenght and width/height). I remember after measuring I thought it will be OK for 30x40cm paper. But, as I didn't actually wash 30x40cm paper yet, take these words with reserve...
I thought first to buy Nova, but Paterson was what I could afford, Nova was expencive for me...
Oh, and I still can't belive how small water flow is needed when washer is in function