I was just looking at some other Sunset I1s, and it would seem that they're all built without the ash dumper. I'm kind of thinking it may have to do with the motor mount screws or possibly the drawbar attachment setup. It's funny some of the shortcuts that even higher end models sometimes have. I just got finished painting an Athearn F59PHI that I've had for awhile, and while I got it secondhand, I think it was fairly high end in its day, and I discovered while working on it that it didn't have windshield wipers. It didn't even have provision for them, so I made a set out of brass wire. It was one of those situations where once you noticed their absence, you couldn't "un-notice" it. I'll be posting pictures eventually, I'm just waiting to finish some passenger cars I'm painting to go with it so I can show them too.