Ok, so I just got home from the event. It was pretty cool. Unfortunately I didn't record anything, but I can certainly type up the questions that I asked him here.
Q: If the technology for 3D printing, CNC milling and the like existed on Sel, would a Forger be able to use it to create stamps, or would they have to do it by hand.
A: They would be able to, but since they have to still create the stamps themselves, they'd have to be the ones to model/draw the stamps. (I take that to mean that a forger couldn't just download someone else's stamp and print it out and use it)
Q: Does TenSoon look like an Irish Wolfhound (which is how I've seen a lot of people draw him) or more like an actual wolf?
A: He looks more like a large wolf-like dog, such as a husky or something (though more wolflike than a husky, he was just using that as an example)
Q: Will we ever get some sort of dictionary/guide to Aons or Forging, one that tells us how they're made, with what all the various parts of a seal mean and how we could theoretically design them?
A: We might, but it would be a ton of work for him to put together. He compared it to when people ask if we'll ever get the full text of the Way of Kings (the in-universe book) and he said that we might, but all he has is an outline.
Q: When a spren changes into a weapon, are they locked into one specific design for that type of weapon? Like, if Syl chose to be a longsword, could she only become that specific longsword?
A: no, they can become whatever they want/need.
Q: Who has the best and worst handwriting in the cosmere?
Hoid's is just terrible, but it can also be really beautiful when he wants to, but Brandon said he didn't have a real answer for this one.
Q: Can you tell me anything new about the force or whatever that opposed Adonalsium (this was what I had him answer in my personalization)
A: "I would count groups of people as a force"