RE: Fire Control lock-on.

Why does it have to be an extra roll?

When I was playing around with sensors rules, I had it as a modifier
to range instead. If you wanted to use extra fire controls, it
reduced the effective range to the target. If the target was stealthed
(or dodging) it increased the range.

I had a limit of a maximum of halving/doubling the range, so a target
at 30" couldn't have it's effective range reduced to below 15"
regardless of the number of fire controls used (each doubling of
the number of FCs reduced range by X").

It has the advantage that range is a lot finer grained than a d6 roll.

-- 
Be seeing you,
Sam.