I found an AD Inter-10, full 531 as well, in much worse condition which I'll eventually recondition. I did get a chance to ride it a bit, however, and it glides over the pavement. The SLE may have different geometry, but it looks similar: longish chainstays and long fork rake. It would give you a much different ride than the Italian frame, which I assume is a race geometry. But you probably already know that. From what I've seen of your posts, you seem to prefer bikes with race geometries, so maybe it's not your cup of tea. But if you want to build up a nice day tourer, this frame would work well for that (provided you find some handlebar water cages!). The other option would to sell the frame alone as a fixie candidate. With no braze-ons, it's a super clean frame. Google Austro Daimler and Puch and you'll find a number of fixies built on these frames.