Remember, the only significant load on these is right at the circled point, that's where the pilot truck attaches and of course, the coupler for the rest of the train is attached to the pilot truck. The sides that seem pliable are strictly cosmetic as were the originals. Although my GG1 didn't have any sideframe issues, I did take one of these and install it for a test. It dropped right in and functioned just like the original. The nice thing is, you don't have to even take the shell off, you can do this all from the outside.
