Can you fold the forward corners in on themselves (like poking the finger of a glove into itself) and tack them down, to give you a tapered forward edge like touring panniers have?
I've only played with one set of Basil panniers, and when I saw them I was thinking about Mimi's experience. So I messed with them a bit...
Maybe try that and see if it gives you enough clearance before you give up on them?
(and Bruiser, I *like* that Schwinn! Thanks for causing me to suffer MORE bike lust in my life!!!!
)
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson