I was having soldering problems. My solder joints where not strong and always coming off.

A fellow racer looked at my setup and noticed I didn't have 60/40 solder. I bought some and used it. Bam, no more problems.

The problem is the solder I was using (don't know the mixture) needed a lot more heat to become soluable(melt). 60/40 is the best way to go and my joints are now staying together.

Hope this helps.