I dunno, I just bought a set today and they're a bit too narrow for my gorilla sized legs to fit between. So(when the "craft center" at the Uni. Of Oregon opens up) I'm gonna borrow one of their torches and make a little jig/ wet rag-hammer it into a more helpful shape. My only worry is torching over the chrome on the handlebars, but the last time I did something like this the heated chrome just crackled off, leaving a ugly-but fairly easily painted nickel coating.
If I can make them just a tiny bit wider at the top, they'll have about the same amount of clearance, if not a tiny bit more.
I'm not really sure what direct USS/tiller means, but the fork has a 3-4" tube with a clamp on the end that attaches the handlebars. We'll see, if it doesn't work out, I've lost 15 bucks and some tinkering time.