If you have enough space for 1 oz of tungsten or titanium you will almost always
have enough room for 1 oz of lead ... think about it. How much weight do we -add-
to a freight car? Two to 3 oz. TOPS. Usually 1 to 1.5 ounces.
I'm saying there is always room for enough lead. There's probably enough
room for enough copper/brass! I know some guys who use pennies for car
weights in their box cars - they say it is cheaper per oz than anything else. ;-)
And it doesn't really matter what scale you are in - although adding weight
is probably physically harder in N-scale simply due to smaller spaces (but you
are adding less weight).
- Jim B.