I agree with BigM555. Most of the pots in the Line6 series are digital pots. Also if your removing stuff thats connected to the PCB you need a micro soldering iron.
Here is a link to one.
http://www.action-electronics.com/weller.htm#Irons. Just search for the word "micro' on the page and you will find it. Honestly without acid etching this is the smallest soldering iron you can use on pcbs. Actually its the tip that matters, but you definitely need a very very small wattage cuz the radiant heat from the tip can start melting other components.