Your right there... even the 605 models we have here in Aus are different as the double pump models require the wider window opening compared to the single pump model. Watch out for torn stainless near the bends & hinge area plus extra drilled holes for those people who lost the key then used garden latches to hold in place.. :-( ... don't laugh, its happened toooo often on pumps I've picked up over the years.
Thank you for letting me know. I thought the two pumps had the same doors. I know the double pump models had larger window openings. I have a Wayne 505 that I'm restoring. Thanks.