Hello Everyone, I have an Athearn SD40T2 that has trouble on 18" curves. It has RP25 wheelsets. I was going to try using the oversized "pizza cutter" wheelsets. I was wondering if Athearn ever made engines with the "pizza cutter" wheelsets that I could just drop in to the SD40T2? I was also thinking of grinding down the flanges on one set of wheels per truck. I don't know if it should be the middle wheels or the rearmost wheels (closest to the fuel tank). Has anyone ever tried either of these approaches? Which one(s) worked for you? I have limited layout space so going to larger curves is not an option. And I do love those Tunnel Motors! Thanks a lot for any information / opinions.