So easy to ease : I took them to replace my regular Tamiya kind plugs which i had problems with : breaking, short curcuit, and too big.
I'm not a pro at welding but this ones are really easy to weld. Warm up fast, and strong. You cannot make mistake with + and - because it is written on it so no worry about that. And you can make go through much more current without being afraid of melting or anything. I think this is one of the first must have if ou still have Tamiya plugs! And it's also cheap.