As far as I know, to submit the initial order, I think you just need the model (AB, Z, Prima), number of strings, and number of pickups. Everything else are open until they get close to actually building yours, that's when you have to lock it in and make no more changes.Oh I've been mining that thread for tons of info! Most recent change is to a FDV neck / SFII middle / FDV bridge configuration. With toggle switches of course.
I'll post there once my order is actually approved, I keep on finding options on the Dingwall site that they don't actually offer (e.g. birdseye make fingerboard, alas). I'm giving my dealer a workout!