+1 and don't stay more than 4/5 seconds or so on the posts when soldering. Flux helps a lot. Posts are the weak spot on this speedo so it needs all the care you can think of. Another thing is not to push too harsh on the posts when you solder your wire, just let the heat melt the solder by contact. I might sound like a paranoid but generally you only solder your ESC once so rather do it well