addressing an RG colleague via the questions section here seems to be an unefficient way. He might not regularily browse the questions here.
The most efficient way for that is to use the RG messenger.
Please go the Marcello's RG home page and press the follow button. After that the message button pops up and you are able to sent a message and in addition you may attach a document. This message will be sent by RG directly to his E-mail address.