After many set-backs a new YMCA celebrated its grand opening in the 115-year-old Park Slope Armory yesterday. The 140,000 square foot space, which used to be a drill factory, will now host separate track, soccer and basketball events as well as weight rooms, fitness machines and exercise classes, according to the Brooklyn Paper. “It’s ginormous!” said Tess Lovell, a first-grader whose school will use the new facility as its gym. As for how the renovation was financed, NY 1 says The Department of Homeless Services gave $8 million, since a women's shelter shares the space, and the rest came from the borough president's office and the City Council. The new Y opens to the public on Jan. 30, and the best part? Like all Brooklyn YMCAs individual memberships costs just $40 a month or $72 for families.