[Nodding, Val examines the schematic as she speaks and illustrates on the edge. The peculiar pen gets a look of its own as well, as she continues to write with it, entirely unaided by ink.]

There are always people running about in battles, bearing arrows and crossbow bolts and things. It wouldn't be a trouble to have every third one carry the flame. But the weather, yes-- Now, where would this toggle go? Here?

[He puts one finger down on the larger and more precise drawing, looking back and forth from her sketch to the full schematic, to keep them both in his view at once.]