Actually, the G21 is not at all related to the Optimod anymore.
It is true that we last summer looked a lot into the optimods when we experimented with ways to control the circuit (as the public discussion over at groupdiy shows), but we ended up having to take an entirely different route - mainly because of the obvious inherent problems in the optimod architecture. It would work well for blind level optimizing, but NOT for sounding neutral/transparant while doing so - and it's idea is to be set-and-forget, where our aim is a very high degree of precise control..
Regarding Vonnegut - you're the first one to spot it!! ;-)