[President_Elect_Shang]

Well the first problem I see is that the combat is run on squares and the system is run on hexes. Unfortunately I think you are shooting for a level of realism that SE5 just can’t deliver. For my purposes I use these terms:

1 square in the combat map is 1ls (light second).
1 hex on the system map is 1lm (light minute).

Obviously this has its flaws, but as I said SE5 just can’t offer that up. Another trick you might try is to determine the scale of the combat map the best you can; you might find something I didn’t, and then adjust the system map to better match your needs. Finally while you are pondering all of this keep in mind that weapons won’t fire on system map so any scale over combat is for all practical purposes useless for the player. Just the modder as we try to lay out the systems.