You will not believe it. It turns out that the part that I need to replace (an actuator?) a kind of arm which moves the tiller :), which means that there is nothing to be soldered, welded or whatever... And I was going crazy here, telling myself off for not paying attention at my physics classes. When I reach the island I will just get the entire arm and I will simply plug it into a socket (works better that way :) ) What a story! Made me laugh. The current is carrying me smoothly to San Fernando.