Have one of the newer 2.0, and they milled out the chassis for a Timney to drop in just fine. That's unlike an older AICS 1.5, where I had to fiddle with the trigger safety pin (or could've milled out the chassis myself).
I have a brand new latest batch AICS 2.0 here... the trigger pocket is *far* more roomy than earlier versions. It looks like a Jewell will fit but since I don't have any Jewell triggers anymore I can't confirm.