Soldering is something I’ve done since about 10 or 11 years old. You’d think I’d know better about melting points. Unfortunately the iron got a bit damaged as it swung around on my desk and ended up burning into a plastic tool. That meant the tip was damaged and solder didn’t melt as quickly. (I later found this site to help) Net effect was that when I went to solder the droppers under one of the points, I used too much time. The seats of the rail melted. I didn’t actually note the problem until I ran a train over the point and wondered why it often derailed. OK, melting…