Yeah, that's good mate, I had a set of those wheels that I sent to Carpy (He bought them from a guy here who wouldn't ship them OS) and they are heavy.
As there weren't many choices available for our bikes I looked for set like yours without success, but eventually the gods smiled at me and I scored a set of Borrani alloy rims, one from Ebay and one from Ron (MCRider1) here, and with bigger Buchanan spokes, they're still quite light, and seriously rigid.
When I finally get my finger out of my asss, I'll true the front wheel and install a new tire, and put them on my racer project. Cheers, Terry.