Technically the event was supposed to happen yesterday but got delayed for a day. The Character would have been, at this point, Unconscious and therefore them being present wasn't at all necessary, however I do believe more Rebel warning that Firebug was alive should have been 'communicated' and more leeway should have been given so they weren't just 'killed' flat out because of one bad decision (To Destroy the Mortar without extracting the Vort First via Mortar Barrage)
The mortar itself has been next to the Transhuman Depot for a couple days now, slowly getting bigger. And then today we moved a 'Battery' inside. Do note, we did delay ourselves for like an additional 1 and a half hours just waiting to see if they would flag on, but the folk in the voice chat had no real way to contact him iirc.