I want to replace the 3 color wires which run from esc to rx. I heard by the grapevine, it is a problem in resoldering new wires due to type of surface and type of solder, any info on the subject will be helpful, thanks. Don't worry i took a chance on soldering and worked out great. New esc/rx wire is 1/3 bigger and longer which can carry juice. Thanks, anyhow.