Thanks for the reply S4.
Now they are pretty good RPers, we've run Viking fantasy, Celtic Druids, Basic D&D and a couple of Star Wars games (homebrew).
Chargen will be a breeze, combat equally easy to run. Commerce - those percentages might be tricky, but I can run them through that. I think they're enamoured of the space stuff, not the dirtside aspect, and I noticed that other than space combat, there's not much going on up there! I saw the JTAS article, but it is fairly bare bones - I'd use it to make my own RP version for the boys, if I had to. Plus the reprint mangles the printing so I have no arrows on my copy ???!!??
Fighting robots or aliens is preferable to blowing people away. They have some familiarity from clips and comic books of Gigers Aliens, and for aliens, I fancy pitching Vagr as wolves of space, terifying, questing, blood-thirsty, scary.
Salvage, thinking about it is easy. I roll to see if there is a wreck, roll for amount salvageable, and again to find out to what lengths they need to go to get at it.
Mining. If they find an asteroid, why not spend 6 months mnng that lucrative rock? I want fluidity, always moving, always prospecting... how would that work? With few rules!!