Calling it an engineering marvel that won’t collapse the roof, Comcast Spectacor executives said the new board will be installed over the summer and will be running in time for the next Sixers and Flyers seasons. Comcast Spectacor, which owns the Flyers and the Wells Fargo Center, says the existing scoreboard contains 2,331 square feet of viewing screen, while the new one will have 6,600.