I really do like your one-dimension range band method for space combat.  It's about what i can hold in my head when DMing after a long day at work. 

Are most starship weapons infinite range when dealing with combat scale?  That's one thing i couldn't find.

I just finished this with my group, and I highly recommend it!  The main boss did in for one of the PCs, but that was due to the overly explosive nature of their solution to the matter.  The markets and all the back-and-forth kept them gleefully occupied for a month or more of sessions.

It's like Musical Chairs, on the moon, with flamethrowers!

Excellent, thank you.

I like this a lot, particularly the addition of 5e style advantage/disadvantage.  

I have a question about that however:  If we're using the D&D style advantage/disadvantage (2d20H and 2d20L, respectively) for attribute rolls, why is it not doing the same for impaired and enhanced attacks, rather than keeping the Cairn-SRD style d4/d12 system?