I haven't read the entire thread, sorry! The SD50/60 truck issue is known about but was very random, did not seem widespread. I can tell you that the SD50/60/60Es are in production now, and we ordered a good quantity of trucks for the parts department at Atlas. I don't have an exact delivery date on the parts, but it should be in the next couple of months. Dave, if you'd like to PM me I can try to help you out once we get the shipment.