Help with my modded x box 360 controller?

Also, what watt soldering iron should I use?Help with my modded x box 360 controller?
If your using your 360 on live and your trying to do rapid fire, dont bother, Xbox has programs, like in COD my friend had a rapid fire controller, and he tryed to use, and his gun jammed in the game, depends on what game your playing, and if you have a moderator in the game,, because if you do,, badddd things will happen