Dear jerryc,

Hope you're well. What's to be gained by removing the factory-applied solder? If the solder is heated to the point where it liquefies - i.e., turns from dull gray to shiny silver - then any micro-cracks in the connections will be closed.

It is especially important to do this on the solder joints, where the main connector attaches to the circuit board. There are also four solder joints - where the main relay is attached to the circuit board - that also must be re-flowed.

Hope this helps.

Yours faithfully,

Spook