I hope Lionel looks into this issue, and comes up with a solution soon. I just bought a JLC silver GG-1 single stripe online, and from the pics that the seller sent to me, one truck looks to be very straight while the other one is slightly, outwardly distorted near two of the three axles. Hopefully, all will arrive intact, and the GG-1 runs well for me, but I am sure I will eventually need at least one replacement full side frame.
What operational issues are occurring from the GG-1s that show side frame bowing? derailing on O-72 curves?