[He thinks he catches that look from Yennefer out of the corner of his eye, like he’s about to be derided for something unsaid or implied — but it seems he’s spared her irritation when both he and Thancred put the blame on not enough laboratory testing and the cold weather, instead. He has no reason to doubt her own abilities to set up the device; he wonders how quick others she knows would be, given he almost won a remark about it just now.

But it’s put aside to focus on more important matters. Stephen makes a noise from the back of his throat.]

Someone could stand in front of it with their arms held out to act as a windshield.

[That’s obviously not a real suggestion.]

We just need to shield it enough for the calibration to stick. Think we can bring the wagon around? I could use my magic as a shield, but I think that’d interfere with the process.