GSR - tells yuo somthing is there, not what. Laser ranger, need to see the target, and distance limited. Nato also had surveyed all their positions, so didn't need GPS in Germany. Quite likley the Pact had too. Then theres the comms problems, FIST is late 80's kit, and our take on the new electronics were based on what the DOD wanted us to know. Finally - there are guns themselves, if you are fighting well into the war they will be well worn, and that has more effects
Therefore, you could but its not too accurate. Might be better to take a standard small reduction, say 1-2 cm. Bear in mind that fire control orders like Fire Grid 123 457, then Left 2000, then right 1000, up 100, fire for effect (could possibly be ME!
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) Be carful with Arty, it's very powerful.
IanS