Got some more info and pics of Carlo and Enzo, the owner of a beautiful VRP RG500 Gamma. Carlo also made frames for the Honda RS500 and the Suzuki RG500 Gamma streetbike. For the Honda he made 3 frames and for the Gamma 6 or 7 frames. Also got an article about the VRP500 published in Moto Tecnica of January 1993 of Enzo.
For the pics and the article see my photoset