I've worked on a regular basis with Enrico for around six months on nm.debian.org maintenance and development. He reviewed my work and helped my patches to fit nm.debian.org coding style, and I helped him having the features he wanted to see developed for the site implemented. For all our exchanges, he signed his messages using GPG key identified by FPR 1793 D6AB 7566 3E6B F104 953A 634F 4BD1 E7AD 5568.