Can I hopelessly muck-up a steel frame by forcing a ISO (EC30) headset into a steel headtube that is sized for a JIS (EC29) headset? Yes, I know the correct thing to do is to get the headtube reamed, but I live in a very rural area and here is how my calls to the two bike shops in town went, Me: "Do you all have a 1-inch ream that can convert a JIS-sized headtube to ISO-sized?" Shop #1 "It can't be done; there is no way that you can make a headtube bigger." Shop #2 "1-inch? No, we don't have anything ancient like that, only tapered reams for modern headsets." The nearest big city option is 5-hours one way & 6-hours the opposite way and there is no way I can afford to make that trip twice (once to drop it off, and once to collect the finished product). I found cautions against doing something like this to an aluminum frame (bulging that will inevitably lead to a crack), but haven't been able to find anything definitive on what can happen to a steel frame. If I go down this road I will sand off whatever paint there is in the headtube, sand off the anodizing off of the cups, and liberally grease both. I thought about trying a brake cylinder hone on the headtube but am scared off of that idea by the horror stories I read about ending up with a non-concentric ISO sized result. Any advice would be much appreciated!

PS I have a very nice 1-inch threadless Tange Prestige steel fork and a lovely Cane Creek headset in my garage waiting to join a frameset. For a variety of reasons I need the wider range of threadless stem options and a threaded JIS headset and quill stem is not a solution for me.