You still haven't corrected 'Ordinance' I see...
The word for ammunition is 'Ordnance' without the 'i' in it. Both words are from the same root, but 'ordinance' is used to designate laws or customs (civil or religious) while 'ordnance' is used to designate military supplies.
Can the 'cost per level' entries take negative numbers so we can have decreasing costs as technology advances? Can tonnage also take negative numbers so size be reduced as tech levels advance?
And btw, just a sudden thought, could we have 'intermittent' beams as well as continuous? It would be cool if you could figure out how to make something 'pulsed' rather like the phasers in Star Trek II. Those had a really satisfyingly believable sense of 'particle beam' about them.