I’m sure the info is out there…
From what I’ve read, I’d maintain the CG location, remove 3000 lbs evenly from the structure, swap out the avionics with G1000 or G3000 (and remove that weight as well, and assume we could find the same amount of weight to remove from the rear of the CG area, though, maybe not) which I imagine would probably save another 250 lbs or more (the avionics cooling improvement advantage that would be created is lost in the simulator).
That’s probably good enough. Extremely likely it’s more complicated than that, but, heck, it’s a simulator.