Good Friday is hopefully the start of something big for Convergence. The progressive metal band from Sault Ste. Marie plays its first show as part of a multi-act bill at Soo Blaster.“This gig is kind of like a springboard into bigger things down the road,” said guitarist Brendan Christie. “We want to make sure that we get everything right the first time.”Christie, Stephen Gagnon-Ruscio, Dave Peredun and Jake Valois will play all eight of Convergence’s original song