The Zoning Board of Appeals (ZBA) signaled an overall openness to the 21-story mixed-use residential tower proposed by V10 Development for the center of the Commercial Triangle area, but the Board also wanted more study and to move cautiously on the area’s first high-rise proposal. Sky Everett is proposed by V10, which is made up of Ricky Beliveau and John Tocco, and would be their second development in Everett after being approved for The 600 on Broadway. On Monday, they were before the ZBA for their first meeting to proposing Sky Everett – a 21-story tower on Spring and Second Streets abutting Market Forge. The proposal includes 366 residential units, with 5 percent affordable, a significant contamination clean-up of the former industrial property, and a noteworthy rooftop restaurant brought by the well-known Varano restaurant family.