I know Sunset 3rd rail made the following B&O steam locos in 3-rail:
EM-1 2-8-8-4 (early and late versions, different front sandbox, different numbers?)
S-1a 2-10-2 (two numbers?)
T-3b 4-8-2 (Vanderbilt and rectangular tender versions?)
Q-4b 2-8-2
L-1 0-8-0
P-7e 4-6-2
Were there any other classes?
Can anyone nail down the different versions that were offered?
TIA