Gentlemen,
D500 makes a great point, the Weaver is some fantastic piece of Brass, if Weaver was still in business the big heavy Scale Brass GG1 would be sitting on my FasTrack right now. With the addition of ERR or original TMCC if it was ever made. Their Brunswick Green is simply awesome!
Even though some scale GG1's can run on 042, they look a lot better on 072 and above.
PCRR/Dave