I can relate to this!! Constructed my layout using 0-36 curves, completed the scenery (tunnels, telegraph poles, trees, etc) with never a thought that I would one day own a Big Boy engine. After watching the videos of the 4014 prototype, I was HOOKED! Ended up buying the LC+ version and **** - that overhang is ridiculous on 0-36!! Considerable renovations had to be made on the right of way - utility poles relocated, trees uprooted. Luckily the monster barely cleared some structures that would have been a real pain to move such as signals and a floodlight tower. But I wasn't as lucky with my tunnel. I had to trim the opening on one of the portals in addition to the internal cavity (fortunately I had rear access thru the back of the mountain).
Next layout will be 0-54 MIN !