Oh, there's no question we'll try the line out. Who knows? It might work without a DI, maybe something like a 1/4 to xlr adapter is all we'll need. That seems to be what you're suggesting, anyway. As for our sound guy, he's not necessarily a "moron" but maybe more confident in his abilities than he should be. That and somewhat--erm--territorial, as in, "You don't tell me what you need, I decide what you need." Plus, there's some history of resources only being available to a select few.