I've a question pertaining to the second character I was considering, for if/when we get around to that point.

It's clear that a person who is naturally unable to access their Arcane network can use specialized tools to in order to make use of it. What I'm wondering if someone who has been forcefully sealed off from their network would be able to use a similar tool (likely created by a Machinist) in order to access at least a portion of the power they once knew.

The idea I'm going for is an ex-Diver who got out of control and crossed too many lines. For his/her crimes, they were imprisoned and had their Arcane network sealed. With the advent of the Arcadian Survey initiative, they were given another chance to put their experience to work. Unable to directly use their own Arcane network, I was thinking they would use one or more foci of sorts (staff, rod, ring, gauntlet, etc) that drew from them directly but were rather limited as to the variety of magic effects each foci could produce.