cool. not too sure which edition I played...but I think Robots could be super do-able. the hard part would be to allow them to buy stats as equipment.
You know, if I wanted to increase strength of my robot, I'd just purchase the new "Strength Booster Pro, version 6.1" or whatever...instead of burning XP.
Or you could mix and match...they could buy the strength with $$$ or XP or a mix of both. So if increasing your strength costs $100, they could give you 100 xp, 100 in cash, or a mix of both...
Just a thought.